CVE-2024-43408 Discourse Placeholder Forms has a XSS stopped by CSP
An attacker can inject malicious scripts via unsanitized user input in Discourse Placeholder Forms, potentially executing code in victim browsers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2024-43408?
CVE-2024-43408 is a medium-severity cross-site scripting vulnerability in discourse-placeholder-theme-component, published on 20 Aug 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Discourse Placeholder Forms will let you build dynamic documentation. Unsanitized and stored user input was injected in the html of the post. The vulnerability is fixed in commit a62f711d5600e4e5d86f342d52932cb6221672e7.
Weakness: CWE-79
Which versions are affected by CVE-2024-43408?
How do I fix CVE-2024-43408?
No fix has been published for CVE-2024-43408 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2024-43408 being exploited?
There is no known exploitation of CVE-2024-43408 in the wild and no public exploit code.
Sources
Also known as GHSA-9wx4-cmv3-g5jw.