CVE-2026-27568
Medium · 6.1CVSS
6.1
EPSS
0.4%
Published
Feb 24, 2026
CISA due date
—
The record
WWBN AVideo is an open source video platform. Prior to version 21.0, AVideo allows Markdown in video comments and uses Parsedown (v1.7.4) without Safe Mode enabled. Markdown links are not sufficiently sanitized, allowing `javascript:` URIs to be rendered as clickable links. An authenticated low-privilege attacker can post a malicious comment that injects persistent JavaScript. When another user clicks the link, the attacker can perform actions such as session hijacking, privilege escalation (including admin takeover), and data exfiltration. Version 21.0 contains a fix. As a workaround, validate and block unsafe URI schemes (e.g., `javascript:`) before rendering Markdown, and enable Parsedown Safe Mode.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Packagist | wwbn/avideo | 0 | 21.0 |
Related vulnerabilities
- GHSA-rcqw-6466-3mv7 AVideo has Stored Cross-Site Scripting via Markdown Comment Injection Same vulnerability
- CVE-2026-30885 WWBN AVideo is an open source video platform. Also affects wwbn/avideo
- GHSA-6w2r-cfpc-23r5 AVideo has Unauthenticated IDOR - Playlist Information Disclosure Also affects wwbn/avideo
- CVE-2026-29058 AVideo is a video-sharing Platform software. Also affects wwbn/avideo
- CVE-2026-28501 WWBN AVideo is an open source video platform. Also affects wwbn/avideo
- CVE-2026-28502 WWBN AVideo is an open source video platform. Also affects wwbn/avideo
- CVE-2026-29093 WWBN AVideo is an open source video platform. Also affects wwbn/avideo
- GHSA-xxpw-32hf-q8v9 AVideo: Unauthenticated PHP session store exposed to host network via published memcached… Also affects wwbn/avideo