CVE-2026-6909: Reflected XSS in ATutor

Published May 11, 2026

Updated

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.

Affected Software

1 affected component

ATutor ATutor=2.2.4

Event History

May 11, 2026

CVE Published

via MITRE·09:40 AM

Data Sourced

via MITRE·09:40 AM

DescriptionWeakness

Data Sourced

via NVD·10:16 AM

DescriptionSeverityWeakness

Frequently Asked Questions

What is the severity of CVE-2026-6909?

CVE-2026-6909 is classified as a medium severity vulnerability due to its potential for executing arbitrary JavaScript in the victim's browser.

How do I fix CVE-2026-6909?

To mitigate CVE-2026-6909, it is recommended to upgrade to a patched version if possible, though ATutor is no longer actively supported.

What type of vulnerability is CVE-2026-6909?

CVE-2026-6909 is a reflected Cross-Site Scripting (XSS) vulnerability.

Which version of ATutor is affected by CVE-2026-6909?

CVE-2026-6909 affects ATutor version 2.2.4.

Can CVE-2026-6909 be exploited remotely?

Yes, CVE-2026-6909 can be exploited remotely through specially crafted URLs.