Vulnerability · Published Sep 4, 2026 · Assigned by VulnCheck

CVE-2026-85577AVideo userLogin.php Reflected XSS via error parameter

Medium 5.4

In plain English

A medium-severity cross-site scripting in AVideo from WWBN. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.3%top 78.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
WWBN	AVideo	0 – through c91b5975d

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

References

GitHub Security Advisory (GHSA-v654-6qw8-pc33) vendor-advisory
VulnCheck Advisory: AVideo userLogin.php Reflected XSS via error parameter third-party-advisory