CVE-2026-64972: Reflected XSS in ATutor
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 previewtop.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.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue?
An attacker must be authenticated to submit a crafted popup parameter to preview.php. The confirmed affected installation was ATutor 2.2.4; other versions were not tested and may also be affected.
Does sanitization in preview_top.php prevent exploitation?
No. Although preview_top.php sanitizes the parameters, the XSS occurs in the parent frameset rendered by preview.php itself.
Is a fix available?
No fix is reported. The product is no longer actively supported, and the reported vulnerabilities have not been fixed.