"WordPress 7.1.2 has been released containing a fix for the vulnerability, and as a courtesy to users on older branches the fix has been backported to all branches back to 4.7"
As a courtesy, I try not to say more than one bad thing about WP every day. FWIW about 1/3 of installs are not on the recent 7 branch.
These are the reason, why every easily reachable web server will be spammed with /something/something.php?somearg=someval. If I had to guess, which software on the web has been the most exploitable over all of the web's history, WP would surely be among the top candidates. Maybe right after MS Teams or Sharepoint or some stuff like that.
TBF, some of it is structural: if you're the most popular anything on the internet, you'll be the most attacked and the most exploited, and hence the most exploitable.
You could've included a little more nuance. An interpretation of your response is "being the most popular remotely accessible software" != "the most attacked", which would need defending.
The access log of public http servers is truly interesting to watch.
You know that the scripts doing it are optimized for success rate, so the types of requests they send give you an impression of what's actually out there.
It's clear to me that once we finally achieve rogue AGI, it is going to propagate through unpatched WordPress WooCommerce instances.
If I had to guess, which software on the web has been the most exploitable over all of the web's history, WP would surely be among the top candidates.
People on HN love to talk smack about WordPress. After all these years, it's as much a reflex as shouting "walled garden!" every time there's an Apple story.
Yet some of the biggest web sites on the internet run WordPress, and more importantly, some of the biggest hacking targets on the internet run WordPress.
Prime example: whitehouse.gov.
If you know what you're doing, WordPress fine. The same is true with every other piece of technology out there.
But people on HN like to lump the good in with the bad because everything is binary.
Anecdote: we contracted a web page, and the guy started saying "it would be a Wordpress. It has very bad press, but it's because it is widely used". Ok, we start developing in the latest version of php, and soon he say "we have to go down a couple phpversions, because x pluging don't work in the latest". Requested version had a dozen critical CVEs. Plugin in question did something really basic, like a preview card with OpenGraph data, or something like that. Something a junior could code in a day.
And that is insecure Wordpress: people lego-mounting sites without touching code, only with plugins.
People who _don't_ know what they are doing are using WP for every project, that they touch, because it is all they know. Given WPs database design, the assumptions baked into that, and the complications resulting from that, make anything other than a posts and pages website a PITA.
This in turn requires one to install shitty plugins, or spend time developing a minimalistic solution to each new challenge. With every plugin the attack surface grows, and the vast majority of larger WP sites is this cobbled together mess of WP plugins, having some WP expert trying to make them all work together without stepping on each other's toes, while hopelessly falling behind on updates, because updates could, and _will_ break things.
People only knowing PHP and WP, try to use WP as a sledgehammer, not realizing that hammer actually being made out of glass. Very few plugins are actually minimalistic, no-bloat, safe, well-developed. Lots of those plugins are 80% marketing fluff and wanting to make a business out of worse than mediocre code bases. That's also due to many people in that community being exactly those, who don't know anything but WP.
Even normal core WP updates can break the legality of ones site. I have had that at some point, where after some WP update it started loading emojis from a friggin third party, to replace the unicode symbol I had used. I was furious, because this needs to be part of the data protection policies/statements. One does not simply load a third party shit, replacing what the dev actually put there, which was just a unicode symbol. That's an idiotic thing to do. If I wanted third-party emojis, I would have included them myself.
Finally, some big pages run on WP says not much, given the catastrophic state of many websites. whitehouse.gov is laughably badly made. Another complete failure. The first thing I see that it loads Google tags manager. A government site loading shit.
lol. From nav directly to some mp4 video?? Not a URL of a page, which then would display the video, but a URL directly to a video? Good that my noscript blocked media on that domain!
If it is a prime example, then it is a prime example of a very shitty made website, by people, who don't know what they should be doing.
So all this shows is one can make a shitty site using WP. Great. I am sure one can also make a not shitty site using WP. Like you say, _"If you know what you are doing ..."_. Just that most WP people don't. They don't know how to not make a mess, or choose the short-term easy way out, and install tons of shitty plugins. Many of them just have to put things up once initially and are paid, or hold the hand open for some maintenance fee they extract, required only due to how badly made these WP sites are.
If you know what you're doing, a loaded gun without a safety is fine, too. But you have the option, why not pick the unloaded one with a safety mechanism?
Manual safety or not is a real debate among people who carry pistols for self defense and law enforcement, and no manual safety is the majority position. The reasoning is that an extra step when the user needs the pistol in an emergency is problematic, a properly designed pistol can only fire if the trigger is pulled, and a properly designed holster makes pulling the trigger impossible until the pistol is drawn. Nobody seriously advocates carrying an unloaded pistol for those purposes, and only lunatics advocate having people who don't know what they're doing carry pistols.
It's not a great analogy to Wordpress, which attempts to provide as much capability as possible in a CMS while requiring as little expertise from the user as possible. Vanilla Wordpress, kept up to date is pretty safe. Plugins are just a click away though, and using plugins safely requires evaluating each plugin's risk profile and track record individually, which is real sysadmin work.
I am so happy that I asked Codex to rewrite our website as Hugo templates which allowed us to statically host it and get rid of Wordpress. So much stress gone!
You can make the most intricate drag and drop admin interfaces to allow the editor to customize everything, and they will still call you to put up every post, so might as well go static
When I finally got approval to rewrite the company blog from Wordpress into something that was mostly static, it was the best week. I used PHP to do mobile/desktop and language selection, because PHP is pretty useful, and it can be pretty fast and secure if you only do simple things.
Never had to worry again about sequencing updates where the update changed the database schema and I had a cluster of 6 web servers. Never had to worry anymore about long ass load times because the web servers were in 3 colos and wordpress wouldn't play nice with local read only mysql replicas. No more worries about why pingbacks and comments keep showing up in the database even those those features were turned off; at least they weren't showing up in a moderation queue, but still.
I had the same itch when I ported my personal blog from WordPress to Astro. I built a fully customisable self-hosted comment system called Discuss. It's got a dashboard and tokenized UI customisation. Pretty light weight too. It's available here - https://github.com/karthikeyankc/discuss . Do give it a spin or fork it. Would love to hear your feedback.
I have full control over the inputs for hugo and the output is pure static HTML. It's better if there are no CVEs but I really don't sweat these. My Hugo template runs 100% pure CSS and no JS.
Ironically, this 9 years old comment on the official documentation page of one of the affected functions perfectly describes both the nature and remediation of this major security flaw:
> Paul Ryan 9 years ago
> Note that locate_template() does not prevent directory traversal attacks, so if you’re passing a user-provided template name to the function, be sure to verify that it’s from one of the three appropriate locations (active theme directory, parent theme directory, or /wp-includes/theme-compat/ directory).
Ahahah I remember to have patched themes for clients by hand, years ago. A different time, where a core team would for whatever reason leave security holes around to be sure you need three frameworks around their pile of dung code.
It's a wonderful piece of software. We've had one of our clients wanting us to "just provide a simple PHP install for wordpress, just hosting" (among some more complex java stuff company wrote for them).
Site hacked within a day from install. Thankfully we have limited outogoing traffic (whitelist on proxy) so only thing exploit managed to replace is their main page with our proxy's 403 error page, but damn, how this piece of software remains so shit till this day is massive achievement in incompetence.
They also manage to fail on every level, like a simple problem of "a service behind a loadbalancer/reverse proxy" is still unsolved because devs refuse to support X-Forwarded-For header in core "because it's not official RFC", and also do not support official RFC for same feature.
WordPress really is a piece of garbage software, and if you've ever developed plugins for it it is soooo apparent.
The documentation is a perfect reflection of the absolute mess of spaghetti code that it is, half of the methods that you will use constantly when developing plugins are undocumented, even untyped. It's literally unusable.
I know WordPress is good thanks to its ecosystem, but really, really, do NOT use it.
It's not clear to me: do we need to both apply the patch _and_ check if our themes are vulnerable, or just apply the patch?
Edit: looking at the patch itself it looks like it fixes the root cause and so it shouldn't matter what themes are doing themselves. But possibly I'm reading it incorrectly.
pearcmd.php must exist, and register_argc_argv must be on, not common with hosting providers. But I am assuming the other themes and meeting conditions possibly affect a lot of WordPress sites.
As the article points out, one issue is that the official Docker container for PHP has this configuration.
However at least in principle all of the affected versions [0] could be automatically updated. Not sure if they have set it to auto-update as far back as 4.7 though.
[0] except 4.9.3 which has a bug in its automatic update mechanism.
pearcmd and register_argc_argv are just examples. get_page_template was unsanitized in some themes, that's the flaw, you could then combine it with one of a million unauthorized file upload in wordpress plugins to try and eval code. An attacker would like to use upload + this chain of requires (instead of just uploading a php) because of hardened configuration and the pwn can go unnoticed in the logs.
Also, with pearcmd (if you can get to that, there's no open_basedir) and containers a novice sysadmin will publish insecure sites.
These CVSS scores don't mean anything and it would be better for everyone if they stopped showing up in headlines. This is a somewhat situational Wordpress RCE that impacts only a couple themes.
Not sure if it’s a couple. Devs routinely make heavily edited copies of the core themes so there will be many, many unpublished themes that use the “page-“ prefix for templates; it was (is?) a reasonably common convention.
(No particular disagreement with the rest of your comment though)
This score specifically means that given some specific conditions, anyone can execute code over the network on a vulnerable WordPress setup. Is this not true?
I'm not saying that the vulnerability isn't severe or important to people running Wordpress, only that CVSS scores are literally a Ouija Board that can come out to whatever the user wants them to.
Yeah give me a vuln and I can make it anything between a 2 and 8 quite easily. I routinely see 10s that are "Critical 10.0 CVE (but only if you're using X language with X setting changed from default, and the attacker can MiTM your traffic)"
> CVSS scores are literally a Ouija Board that can come out to whatever the user wants them to.
Not really. They are very good at describing the technical impact. Sometimes pre-condition is very rare and that reduces overall likelihood but for those few it applies, the impact still could be catastrophic. Who wants to risk it if whole business could go down?
Published CVSS is a base score that gives you a hint of how important the analysis of a vulnerability is to prioritise the patching or mitigation. What you see on websites is only ever the base spiciness so to speak. If you have for example wordpress only running in an isolated environment behind internal firewall rules you‘d downgrade it accordingly. It’s a imperfect metric but so far the best we have to signal priorities. It’s all described in its spec that no one seems to read and websites also communicate it badly.
CVSS is impossible to communicate effectively. We don't need a metric; I'm already going to have to read and assess the vulnerability to decide how I actually want to assess the risk given my infrastructure, so the number's not doing me any good.
This isn't just a CVSS issue: there have been a variety of attempts to reduce a risk score down to a single general number and they all end up as somewhere between marketing material, scare tactic, and junk science.
> We don't need a metric; I'm already going to have to read and assess the vulnerability to decide how I actually want to assess the risk given my infrastructure, so the number's not doing me any good.
Would you say that vulnerability with CVSS score that points to low is equally important to verify and take care of than CVSS which points to critical?
Yes. I believe that using CVSS scores as a first pass to decide which vulnerabilities to review is risky.
The most boring reason, even if you take CVSS scores at face value, is that in many cases it is possible to leverage multiple "low" severity vulnerabilities into a massive impact.
But the bigger reason is that CVSS scores are all over the place, and the people operating roulette wheel that generates them do not have any insight into any specific person's systems.
> These metrics enable the analyst to customize the CVSS score depending on the importance of the affected IT asset to a user’s organization, measured in terms of complementary/alternative security controls in place, Confidentiality, Integrity, and Availability. The metrics are the modified equivalent of base metrics and are assigned metric values based on the component placement in organization infrastructure.
You need to reason about both probability and impact, not one or the other. In your example, it just means that the probability is very low, perhaps even down to 0 in your specific case. But even at a low probability, the impact of the vulnerability remains very high so it helps you reason about it.
For example, you might react differently to these scores:
- <8/10: check that your systems are indeed secure
- 8.6/10: check that your systems are indeed secure and tell your junior analyst to train on creating a custom monitoring rule for that attack and follow-up with you
- 9.8/10: double-check that your systems are indeed secure, ensure that if you had a hole another security layer would have caught it (if not, that's a problem!), set up a honeypot to get some info on the assholes that have repeatedly attacked you lately and will undoubtedly try to 0-day you in the next few hours, etc.
> This is a somewhat situational Wordpress RCE that impacts only a couple themes.
reply
That is dangerously incorrect, a whole lot of themes are vulnerable. The main pre-condition, "presence of a top-level directory named 'page-xxx' like 'page-templates' in the theme's directory" is actually an official recommendation in the WordPress documentation.
> As discussed in Organizing Theme Files, WordPress can recognize page templates stored in the theme’s root folder or in a first-level subdirectory of the theme folder. *The page-templates/ folder is a common convention* for organizing global page templates, but it is not required. Page templates can also be stored in other first-level subdirectories, such as templates/ or page_templates/.
Yeah not sure why you’re being downvoted when the built in themes are vulnerable as is the default docker image pre php8.5 which a lot of people use as a base and I bet a lot of hosting providers use as well behind the scenes.
It's crazy how many users are standing by this take. Not only is a 9.8 CVSS critical, even if it doesn't affect your config, you should trash any dependency that has so many 9+CVSS vulns that you become numb to them.
When you use a dependency and a 9+CVSS vuln comes out, you read it and respect it. If you come to the conclusion that CVSS don't mean anything because there's just so many vulns, that's saying something of the dependency and your security posture.
Burn Wordpress with a flemmenwerfer, or build a hard virtualization layer around it, give it its own scoped certs, your Wordpress things will get hacked, especially if they use plugins.
There is always this idea that the most used software also has the most vulnerabilities, but I think its an interesting question if this is actually true in light of AI. Like humans wouldn't spend a combined 100,000 hours or something looking at some obscure code, but an AI might do the equivalent across the entire ecosystem. Like if this idea is really true, we should see CVE's go into the millions per year soon, although I guess for now it's still bounded by compute budget but I question if the initial premise is true to begin with or if PHP is just shit. /s
"WordPress 7.1.2 has been released containing a fix for the vulnerability, and as a courtesy to users on older branches the fix has been backported to all branches back to 4.7"
As a courtesy, I try not to say more than one bad thing about WP every day. FWIW about 1/3 of installs are not on the recent 7 branch.
These are the reason, why every easily reachable web server will be spammed with /something/something.php?somearg=someval. If I had to guess, which software on the web has been the most exploitable over all of the web's history, WP would surely be among the top candidates. Maybe right after MS Teams or Sharepoint or some stuff like that.
TBF, some of it is structural: if you're the most popular anything on the internet, you'll be the most attacked and the most exploited, and hence the most exploitable.
Yes and Wordpress is a pile of garbage.
nginx serves a third of web traffic.
Nginx also has cves.
Nowhere near what WP has, and nowhere near the crap design allowing it, and the clusterfuck of bad decisions WP has that enables them...
WP is just RCE-as-a-Service.
That's not really true.
Edit: wow that's a lot of downvotes! I'm surprised people can't identify a trivial reasoning failure.
You could've included a little more nuance. An interpretation of your response is "being the most popular remotely accessible software" != "the most attacked", which would need defending.
> WP would surely be among the top candidates
And its closely related cousin, Joomla.
Joomla makes WP look like Fort Knox.
The access log of public http servers is truly interesting to watch.
You know that the scripts doing it are optimized for success rate, so the types of requests they send give you an impression of what's actually out there.
It's clear to me that once we finally achieve rogue AGI, it is going to propagate through unpatched WordPress WooCommerce instances.
Not success rate per request though.
It seems the most common issue of them all is an exposed .env file by that measure.
If I had to guess, which software on the web has been the most exploitable over all of the web's history, WP would surely be among the top candidates.
People on HN love to talk smack about WordPress. After all these years, it's as much a reflex as shouting "walled garden!" every time there's an Apple story.
Yet some of the biggest web sites on the internet run WordPress, and more importantly, some of the biggest hacking targets on the internet run WordPress.
Prime example: whitehouse.gov.
If you know what you're doing, WordPress fine. The same is true with every other piece of technology out there.
But people on HN like to lump the good in with the bad because everything is binary.
> If you know what you're doing, WordPress fine.
Probably true, but for whatever reason Wordpress seems to attract an awful lot of people that do not know what they are doing
Anecdote: we contracted a web page, and the guy started saying "it would be a Wordpress. It has very bad press, but it's because it is widely used". Ok, we start developing in the latest version of php, and soon he say "we have to go down a couple phpversions, because x pluging don't work in the latest". Requested version had a dozen critical CVEs. Plugin in question did something really basic, like a preview card with OpenGraph data, or something like that. Something a junior could code in a day.
And that is insecure Wordpress: people lego-mounting sites without touching code, only with plugins.
> And that is insecure Wordpress: people lego-mounting sites without touching code, only with plugins.
Works as intended, that's why WP has been so popular
Pros: it has a low entry barrier
Cons: it has a low entry barrier
I think the problem is of another nature:
People who _don't_ know what they are doing are using WP for every project, that they touch, because it is all they know. Given WPs database design, the assumptions baked into that, and the complications resulting from that, make anything other than a posts and pages website a PITA.
This in turn requires one to install shitty plugins, or spend time developing a minimalistic solution to each new challenge. With every plugin the attack surface grows, and the vast majority of larger WP sites is this cobbled together mess of WP plugins, having some WP expert trying to make them all work together without stepping on each other's toes, while hopelessly falling behind on updates, because updates could, and _will_ break things.
People only knowing PHP and WP, try to use WP as a sledgehammer, not realizing that hammer actually being made out of glass. Very few plugins are actually minimalistic, no-bloat, safe, well-developed. Lots of those plugins are 80% marketing fluff and wanting to make a business out of worse than mediocre code bases. That's also due to many people in that community being exactly those, who don't know anything but WP.
Even normal core WP updates can break the legality of ones site. I have had that at some point, where after some WP update it started loading emojis from a friggin third party, to replace the unicode symbol I had used. I was furious, because this needs to be part of the data protection policies/statements. One does not simply load a third party shit, replacing what the dev actually put there, which was just a unicode symbol. That's an idiotic thing to do. If I wanted third-party emojis, I would have included them myself.
Finally, some big pages run on WP says not much, given the catastrophic state of many websites. whitehouse.gov is laughably badly made. Another complete failure. The first thing I see that it loads Google tags manager. A government site loading shit.
All this crap. And this is only what is loaded right out of the box. I haven't even allowed their shitty scripts to run yet.And the navigation font is tiiiny. What a horrendous design.
When I click on some navigation link, it wants to go to:
lol. From nav directly to some mp4 video?? Not a URL of a page, which then would display the video, but a URL directly to a video? Good that my noscript blocked media on that domain!If it is a prime example, then it is a prime example of a very shitty made website, by people, who don't know what they should be doing.
So all this shows is one can make a shitty site using WP. Great. I am sure one can also make a not shitty site using WP. Like you say, _"If you know what you are doing ..."_. Just that most WP people don't. They don't know how to not make a mess, or choose the short-term easy way out, and install tons of shitty plugins. Many of them just have to put things up once initially and are paid, or hold the hand open for some maintenance fee they extract, required only due to how badly made these WP sites are.
> If you know what you're doing, WordPress fine
If you know what you're doing, a loaded gun without a safety is fine, too. But you have the option, why not pick the unloaded one with a safety mechanism?
Manual safety or not is a real debate among people who carry pistols for self defense and law enforcement, and no manual safety is the majority position. The reasoning is that an extra step when the user needs the pistol in an emergency is problematic, a properly designed pistol can only fire if the trigger is pulled, and a properly designed holster makes pulling the trigger impossible until the pistol is drawn. Nobody seriously advocates carrying an unloaded pistol for those purposes, and only lunatics advocate having people who don't know what they're doing carry pistols.
It's not a great analogy to Wordpress, which attempts to provide as much capability as possible in a CMS while requiring as little expertise from the user as possible. Vanilla Wordpress, kept up to date is pretty safe. Plugins are just a click away though, and using plugins safely requires evaluating each plugin's risk profile and track record individually, which is real sysadmin work.
to be fair it is one of the top CMS's on the web (probably won't be in 2027) and its PHP / Mysql which in history have been very exploitable.
I am so happy that I asked Codex to rewrite our website as Hugo templates which allowed us to statically host it and get rid of Wordpress. So much stress gone!
Codex wrote you a website, or wrote you a pluggable CMS usable and configurable by non-coders?
You can make the most intricate drag and drop admin interfaces to allow the editor to customize everything, and they will still call you to put up every post, so might as well go static
When I finally got approval to rewrite the company blog from Wordpress into something that was mostly static, it was the best week. I used PHP to do mobile/desktop and language selection, because PHP is pretty useful, and it can be pretty fast and secure if you only do simple things.
Never had to worry again about sequencing updates where the update changed the database schema and I had a cluster of 6 web servers. Never had to worry anymore about long ass load times because the web servers were in 3 colos and wordpress wouldn't play nice with local read only mysql replicas. No more worries about why pingbacks and comments keep showing up in the database even those those features were turned off; at least they weren't showing up in a moderation queue, but still.
Is there a good replacement for wordpress comments? That's the one thing holding me back from porting at the moment.
I had the same itch when I ported my personal blog from WordPress to Astro. I built a fully customisable self-hosted comment system called Discuss. It's got a dashboard and tokenized UI customisation. Pretty light weight too. It's available here - https://github.com/karthikeyankc/discuss . Do give it a spin or fork it. Would love to hear your feedback.
Yes! https://comments.purecommons.org/
I think you can render Disqus on static websites, but Disqus is its own piece of crap so not sure you'd want to.
Sorry in advance if you were joking, but for readers who aren't in the know: Hugo had, in fact, two 9.3 CVSS vulnerabilities just 11 days ago...
https://app.opencve.io/cve/CVE-2026-89259
https://app.opencve.io/cve/CVE-2026-89258
I have full control over the inputs for hugo and the output is pure static HTML. It's better if there are no CVEs but I really don't sweat these. My Hugo template runs 100% pure CSS and no JS.
To be clear, those are CVEs in the tooling, not in the generated static sites. Not great, but very different from this WordPress CVE
This thread is fucking unhinged
The patch (identified from https://github.com/WordPress/wordpress-develop/compare/7.1.1...):
https://github.com/WordPress/wordpress-develop/commit/9c4e85...
It's crazy to me that WP still doesn't make use of proper function type declarations, 11 years after they were added to PHP.
Inertia. The minimum PHP version that WP needs--in practice--is PHP 7.0.
Ironically, this 9 years old comment on the official documentation page of one of the affected functions perfectly describes both the nature and remediation of this major security flaw:
> Paul Ryan 9 years ago
> Note that locate_template() does not prevent directory traversal attacks, so if you’re passing a user-provided template name to the function, be sure to verify that it’s from one of the three appropriate locations (active theme directory, parent theme directory, or /wp-includes/theme-compat/ directory).
https://developer.wordpress.org/reference/functions/locate_t...
I wonder if they'll add a `locate_template_safe()` function to "fix" it. :D
It's a mystery how this exploit was found.
/sarc
Ahahah I remember to have patched themes for clients by hand, years ago. A different time, where a core team would for whatever reason leave security holes around to be sure you need three frameworks around their pile of dung code.
It's a wonderful piece of software. We've had one of our clients wanting us to "just provide a simple PHP install for wordpress, just hosting" (among some more complex java stuff company wrote for them).
Site hacked within a day from install. Thankfully we have limited outogoing traffic (whitelist on proxy) so only thing exploit managed to replace is their main page with our proxy's 403 error page, but damn, how this piece of software remains so shit till this day is massive achievement in incompetence.
They also manage to fail on every level, like a simple problem of "a service behind a loadbalancer/reverse proxy" is still unsolved because devs refuse to support X-Forwarded-For header in core "because it's not official RFC", and also do not support official RFC for same feature.
WordPress really is a piece of garbage software, and if you've ever developed plugins for it it is soooo apparent.
The documentation is a perfect reflection of the absolute mess of spaghetti code that it is, half of the methods that you will use constantly when developing plugins are undocumented, even untyped. It's literally unusable.
I know WordPress is good thanks to its ecosystem, but really, really, do NOT use it.
Using WordPress is like chewing discarded gum you find lying in the street.
hmm, this may be why i just saw an unexpected update to a very old theme.
It's not clear to me: do we need to both apply the patch _and_ check if our themes are vulnerable, or just apply the patch?
Edit: looking at the patch itself it looks like it fixes the root cause and so it shouldn't matter what themes are doing themselves. But possibly I'm reading it incorrectly.
pearcmd.php must exist, and register_argc_argv must be on, not common with hosting providers. But I am assuming the other themes and meeting conditions possibly affect a lot of WordPress sites.
As the article points out, one issue is that the official Docker container for PHP has this configuration.
However at least in principle all of the affected versions [0] could be automatically updated. Not sure if they have set it to auto-update as far back as 4.7 though.
[0] except 4.9.3 which has a bug in its automatic update mechanism.
pearcmd and register_argc_argv are just examples. get_page_template was unsanitized in some themes, that's the flaw, you could then combine it with one of a million unauthorized file upload in wordpress plugins to try and eval code. An attacker would like to use upload + this chain of requires (instead of just uploading a php) because of hardened configuration and the pwn can go unnoticed in the logs.
Also, with pearcmd (if you can get to that, there's no open_basedir) and containers a novice sysadmin will publish insecure sites.
These CVSS scores don't mean anything and it would be better for everyone if they stopped showing up in headlines. This is a somewhat situational Wordpress RCE that impacts only a couple themes.
Not sure if it’s a couple. Devs routinely make heavily edited copies of the core themes so there will be many, many unpublished themes that use the “page-“ prefix for templates; it was (is?) a reasonably common convention.
(No particular disagreement with the rest of your comment though)
This score specifically means that given some specific conditions, anyone can execute code over the network on a vulnerable WordPress setup. Is this not true?
I'm not saying that the vulnerability isn't severe or important to people running Wordpress, only that CVSS scores are literally a Ouija Board that can come out to whatever the user wants them to.
Yeah give me a vuln and I can make it anything between a 2 and 8 quite easily. I routinely see 10s that are "Critical 10.0 CVE (but only if you're using X language with X setting changed from default, and the attacker can MiTM your traffic)"
> CVSS scores are literally a Ouija Board that can come out to whatever the user wants them to.
Not really. They are very good at describing the technical impact. Sometimes pre-condition is very rare and that reduces overall likelihood but for those few it applies, the impact still could be catastrophic. Who wants to risk it if whole business could go down?
So if I get a 9.8 that doesn't apply to my usage, what is the CVSS score doing for me?
Published CVSS is a base score that gives you a hint of how important the analysis of a vulnerability is to prioritise the patching or mitigation. What you see on websites is only ever the base spiciness so to speak. If you have for example wordpress only running in an isolated environment behind internal firewall rules you‘d downgrade it accordingly. It’s a imperfect metric but so far the best we have to signal priorities. It’s all described in its spec that no one seems to read and websites also communicate it badly.
CVSS is impossible to communicate effectively. We don't need a metric; I'm already going to have to read and assess the vulnerability to decide how I actually want to assess the risk given my infrastructure, so the number's not doing me any good.
This isn't just a CVSS issue: there have been a variety of attempts to reduce a risk score down to a single general number and they all end up as somewhere between marketing material, scare tactic, and junk science.
> We don't need a metric; I'm already going to have to read and assess the vulnerability to decide how I actually want to assess the risk given my infrastructure, so the number's not doing me any good.
Would you say that vulnerability with CVSS score that points to low is equally important to verify and take care of than CVSS which points to critical?
Yes. I believe that using CVSS scores as a first pass to decide which vulnerabilities to review is risky.
The most boring reason, even if you take CVSS scores at face value, is that in many cases it is possible to leverage multiple "low" severity vulnerabilities into a massive impact.
But the bigger reason is that CVSS scores are all over the place, and the people operating roulette wheel that generates them do not have any insight into any specific person's systems.
Yes. It's amazing how supposedly security professionals only take the base score "as is" and never adjust.
Many GUI CVSS calculators exist just for this, it takes a minute to requalify a vuln and adjust its CVSS based on your specific environment.
This one for example is pretty basic but works well: https://www.first.org/cvss/calculator/4.0
> These metrics enable the analyst to customize the CVSS score depending on the importance of the affected IT asset to a user’s organization, measured in terms of complementary/alternative security controls in place, Confidentiality, Integrity, and Availability. The metrics are the modified equivalent of base metrics and are assigned metric values based on the component placement in organization infrastructure.
You need to reason about both probability and impact, not one or the other. In your example, it just means that the probability is very low, perhaps even down to 0 in your specific case. But even at a low probability, the impact of the vulnerability remains very high so it helps you reason about it.
For example, you might react differently to these scores:
- <8/10: check that your systems are indeed secure
- 8.6/10: check that your systems are indeed secure and tell your junior analyst to train on creating a custom monitoring rule for that attack and follow-up with you
- 9.8/10: double-check that your systems are indeed secure, ensure that if you had a hole another security layer would have caught it (if not, that's a problem!), set up a honeypot to get some info on the assholes that have repeatedly attacked you lately and will undoubtedly try to 0-day you in the next few hours, etc.
My assumption is that any Wordpress setup whatsoever allows anyone to execute code remotely.
Indeed, it's a foothold into a network.
> This is a somewhat situational Wordpress RCE that impacts only a couple themes. reply
That is dangerously incorrect, a whole lot of themes are vulnerable. The main pre-condition, "presence of a top-level directory named 'page-xxx' like 'page-templates' in the theme's directory" is actually an official recommendation in the WordPress documentation.
See here: https://developer.wordpress.org/themes/classic-themes/templa...
> As discussed in Organizing Theme Files, WordPress can recognize page templates stored in the theme’s root folder or in a first-level subdirectory of the theme folder. *The page-templates/ folder is a common convention* for organizing global page templates, but it is not required. Page templates can also be stored in other first-level subdirectories, such as templates/ or page_templates/.
Yeah not sure why you’re being downvoted when the built in themes are vulnerable as is the default docker image pre php8.5 which a lot of people use as a base and I bet a lot of hosting providers use as well behind the scenes.
It's crazy how many users are standing by this take. Not only is a 9.8 CVSS critical, even if it doesn't affect your config, you should trash any dependency that has so many 9+CVSS vulns that you become numb to them.
When you use a dependency and a 9+CVSS vuln comes out, you read it and respect it. If you come to the conclusion that CVSS don't mean anything because there's just so many vulns, that's saying something of the dependency and your security posture.
Burn Wordpress with a flemmenwerfer, or build a hard virtualization layer around it, give it its own scoped certs, your Wordpress things will get hacked, especially if they use plugins.
There is always this idea that the most used software also has the most vulnerabilities, but I think its an interesting question if this is actually true in light of AI. Like humans wouldn't spend a combined 100,000 hours or something looking at some obscure code, but an AI might do the equivalent across the entire ecosystem. Like if this idea is really true, we should see CVE's go into the millions per year soon, although I guess for now it's still bounded by compute budget but I question if the initial premise is true to begin with or if PHP is just shit. /s