CVE-2026-6909 Reflected XSS in ATutor
Reflected XSS in ATutor allows arbitrary JavaScript execution via crafted URLs, affecting an unsupported learning management system.
- 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-2026-6909?
CVE-2026-6909 is a medium-severity cross-site scripting vulnerability in ATutor, published on 11 May 2026. 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
ATutor is vulnerable to Reflected XSS in /install/upgrade.php endpoint. An attacker can provide a specially crafted URL that, when opened, results in arbitrary JavaScript execution in the victim's browser.
Product is no longer actively supported. Maintainers of this project were notified early about this vulnerability, but did not respond with the details of the vulnerability or vulnerable version range. Only version 2.2.4 was tested and confirmed as vulnerable, other versions were not tested but might also be vulnerable.
Weakness: CWE-79
Which versions are affected by CVE-2026-6909?
How do I fix CVE-2026-6909?
No fix has been published for CVE-2026-6909 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-2026-6909 being exploited?
There is no known exploitation of CVE-2026-6909 in the wild and no public exploit code.
Sources
Also known as GHSA-wcg3-35qx-r9pp.