Cross-site scripting in AVideo - CVE-2026-105089
Published: November 11, 2026 / Updated: November 13, 2026
Vulnerability identifier: #VU165934
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2026-105089
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to execute arbitrary JavaScript in visitors' browsers, including administrators, and perform actions using their sessions.
The vulnerability exists due to missing context-sensitive output escaping in AVideo's YouPHPFlix2 and channel playlist templates when rendering stored trailer1 URLs in onclick handlers and iframe src attributes. A remote user can use upload permission to store crafted URLs, including https://evil.example/"><script>alert(1)</script>, to execute scripts when victims view the YouPHPFlix2 home page or click affected trailer buttons on that page or a channel playlist.
Affected software
AVideo
How to mitigate CVE-2026-105089
Install security update from vendor's website.
AVideo - update to 29.3.0