CVE-2026-85159 AVideo Reflected XSS via cancelUri in userLogin.php
Unauthenticated attackers can execute arbitrary JavaScript in user browsers via reflected XSS in the login page's cancelUri parameter.
- 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-2026-85159?
CVE-2026-85159 is a medium-severity cross-site scripting vulnerability in WWBN AVideo, published on 3 Sep 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
AVideo through commit c91b5975d contains a reflected cross-site scripting vulnerability in userLogin.php where the cancelUri parameter is echoed in an href attribute after isSafeRedirectURL checks protocol only, not HTML characters. Unauthenticated attackers can inject event handlers via relative URLs with embedded quotes to execute arbitrary JavaScript when users interact with the Cancel button.
Weakness: CWE-79
Which versions are affected by CVE-2026-85159?
How do I fix CVE-2026-85159?
No fix has been published for CVE-2026-85159 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-2026-85159 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85159 exists.
Sources
Also known as GHSA-gr2c-r9h3-6533, GHSA-mw3g-2292-vw4c.