CVE-2026-85577 AVideo userLogin.php Reflected XSS via error parameter
Unauthenticated attackers can execute arbitrary JavaScript in victims' browsers via a reflected XSS vulnerability in the AVideo login page.
- 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-2026-85577?
CVE-2026-85577 is a medium-severity cross-site scripting vulnerability in WWBN AVideo, published on 4 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 that allows unauthenticated attackers to inject arbitrary JavaScript by closing the script tag with </script>. Attackers can craft a malicious URL with an error parameter containing script breakout sequences to execute arbitrary JavaScript in the victim's browser context on the login page.
Weakness: CWE-79
Which versions are affected by CVE-2026-85577?
How do I fix CVE-2026-85577?
No fix has been published for CVE-2026-85577 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-2026-85577 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85577 exists.
Sources
Also known as GHSA-6r7w-x557-3659, GHSA-v654-6qw8-pc33.