CVE-2026-64972 Reflected XSS in ATutor
Authenticated attackers can execute arbitrary scripts via reflected XSS in ATutor's preview.php, risking session hijacking or data theft.
- 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-2026-64972?
CVE-2026-64972 is a medium-severity cross-site scripting vulnerability in ATutor, published on 20 Aug 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
ATutor is vulnerable to Reflected XSS via popup parameter in preview.php. An authenticated attacker can inject a double quote into the popup parameter, break out of the attribute value, and append a new event handler such as onload. The related preview_top.php file sanitises these parameters, but that does not prevent XSS in the parent frameset rendered by preview.php itself.
Product is no longer actively supported and the vulnerabilities have not been fixed. 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-2026-64972?
How do I fix CVE-2026-64972?
No fix has been published for CVE-2026-64972 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-2026-64972 being exploited?
There is no known exploitation of CVE-2026-64972 in the wild and no public exploit code.
Sources
Also known as GHSA-2fm5-jp2h-3vgh.