SB2026111213 - Multiple vulnerabilities in AVideo

Description

This security bulletin contains information about 2 vulnerabilities.

1) Cross-site scripting (CVE-ID: CVE-2026-105089)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: 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]

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.

2) Cross-site scripting (CVE-ID: CVE-2026-105086)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: 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]

The vulnerability allows a remote user to execute JavaScript in visitors' and administrators' browsers, access sensitive information, and perform administrative actions through a victim's session.

The vulnerability exists due to improper output neutralization in AVideo's video-title handling when successive safeString() calls decode entities after stripping tags and templates render stored titles unescaped. A remote user can upload a video with the title &&&amp;lt;lt;img src=x onerror=alert(1)&&&amp;gt;gt; to execute JavaScript when a victim views a page displaying the listed video.

Remediation

Install update from vendor's website.

References

• https://github.com/WWBN/AVideo/security/advisories/GHSA-6wfr-c7fw-4xvw
• https://github.com/WWBN/AVideo/security/advisories/GHSA-q62w-927x-vhhf