CVE-2026-41467 ProjeQtor < 12.4.4 Stored XSS via checkValidFileName()
Authenticated attackers can upload malicious HTML files to execute arbitrary JavaScript in other users' browsers via stored XSS.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-41467?
CVE-2026-41467 is a medium-severity cross-site scripting vulnerability in ProjeQtor, published on 27 Apr 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
ProjeQtor versions 7.0 through 12.4.3 contain a stored cross-site scripting vulnerability in the file upload functionality where the checkValidFileName() function fails to restrict HTML and HTM file uploads. Authenticated attackers can upload HTML files containing arbitrary JavaScript through the image upload or attachment endpoints, and any user accessing the uploaded file URL will execute the embedded JavaScript in their browser.
Weakness: CWE-79
Which versions are affected by CVE-2026-41467?
How do I fix CVE-2026-41467?
No fix has been published for CVE-2026-41467 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-2026-41467 being exploited?
There is no known exploitation of CVE-2026-41467 in the wild and no public exploit code.
Sources
Also known as GHSA-g3mv-hfmp-474q.