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Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-33500

WWBN AVideo is an open source video platform. In versions up to and including 26.0, the fix for CVE-2026-27568 (GHSA-rcqw-6466-3mv7) introduced a custom `ParsedownSafeWithLinks` class that sanitizes raw HTML `<a>` and `<img>` tags in comments, but explicitly disables Parsedown's `safeMode`. This creates a bypass: markdown link syntax `[text](javascript:alert(1))` is processed by Parsedown's `inlineLink()` method, which does not go through the custom `sanitizeATag()` sanitization (that only handles raw HTML tags). With `safeMode` disabled, Parsedown's built-in `javascript:` URI filtering (`sanitiseElement()`/`filterUnsafeUrlInAttribute()`) is also inactive. An attacker can inject stored XSS via comment markdown links. Commit 3ae02fa240939dbefc5949d64f05790fd25d728d contains a patch.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 2.4%
CVSS Severity
CVSS v3 Score 5.4
Products affected by CVE-2026-33500
  • Wwbn » Avideo » Version: N/A
    cpe:2.3:a:wwbn:avideo:-
  • Wwbn » Avideo » Version: 10.1
    cpe:2.3:a:wwbn:avideo:10.1
  • Wwbn » Avideo » Version: 10.2
    cpe:2.3:a:wwbn:avideo:10.2
  • Wwbn » Avideo » Version: 10.4
    cpe:2.3:a:wwbn:avideo:10.4
  • Wwbn » Avideo » Version: 10.8
    cpe:2.3:a:wwbn:avideo:10.8
  • Wwbn » Avideo » Version: 11
    cpe:2.3:a:wwbn:avideo:11
  • Wwbn » Avideo » Version: 11.1
    cpe:2.3:a:wwbn:avideo:11.1
  • Wwbn » Avideo » Version: 11.1.1
    cpe:2.3:a:wwbn:avideo:11.1.1
  • Wwbn » Avideo » Version: 11.5
    cpe:2.3:a:wwbn:avideo:11.5
  • Wwbn » Avideo » Version: 11.6
    cpe:2.3:a:wwbn:avideo:11.6
  • Wwbn » Avideo » Version: 12.4
    cpe:2.3:a:wwbn:avideo:12.4
  • Wwbn » Avideo » Version: 14.2
    cpe:2.3:a:wwbn:avideo:14.2
  • Wwbn » Avideo » Version: 14.3
    cpe:2.3:a:wwbn:avideo:14.3
  • Wwbn » Avideo » Version: 14.3.1
    cpe:2.3:a:wwbn:avideo:14.3.1
  • Wwbn » Avideo » Version: 14.4
    cpe:2.3:a:wwbn:avideo:14.4
  • Wwbn » Avideo » Version: 2.2
    cpe:2.3:a:wwbn:avideo:2.2
  • Wwbn » Avideo » Version: 2.4
    cpe:2.3:a:wwbn:avideo:2.4
  • Wwbn » Avideo » Version: 2.7
    cpe:2.3:a:wwbn:avideo:2.7
  • Wwbn » Avideo » Version: 3.4
    cpe:2.3:a:wwbn:avideo:3.4
  • Wwbn » Avideo » Version: 3.4.1
    cpe:2.3:a:wwbn:avideo:3.4.1
  • Wwbn » Avideo » Version: 4.0
    cpe:2.3:a:wwbn:avideo:4.0
  • Wwbn » Avideo » Version: 4.0.1
    cpe:2.3:a:wwbn:avideo:4.0.1
  • Wwbn » Avideo » Version: 4.0.2
    cpe:2.3:a:wwbn:avideo:4.0.2
  • Wwbn » Avideo » Version: 5.0
    cpe:2.3:a:wwbn:avideo:5.0
  • Wwbn » Avideo » Version: 6.5
    cpe:2.3:a:wwbn:avideo:6.5
  • Wwbn » Avideo » Version: 7.2
    cpe:2.3:a:wwbn:avideo:7.2
  • Wwbn » Avideo » Version: 7.3
    cpe:2.3:a:wwbn:avideo:7.3
  • Wwbn » Avideo » Version: 7.4
    cpe:2.3:a:wwbn:avideo:7.4
  • Wwbn » Avideo » Version: 7.5
    cpe:2.3:a:wwbn:avideo:7.5
  • Wwbn » Avideo » Version: 7.6
    cpe:2.3:a:wwbn:avideo:7.6
  • Wwbn » Avideo » Version: 7.7
    cpe:2.3:a:wwbn:avideo:7.7
  • Wwbn » Avideo » Version: 7.8
    cpe:2.3:a:wwbn:avideo:7.8
  • Wwbn » Avideo » Version: 8.1
    cpe:2.3:a:wwbn:avideo:8.1
  • Wwbn » Avideo » Version: 8.5
    cpe:2.3:a:wwbn:avideo:8.5
  • Wwbn » Avideo » Version: 8.6
    cpe:2.3:a:wwbn:avideo:8.6
  • Wwbn » Avideo » Version: 8.7
    cpe:2.3:a:wwbn:avideo:8.7
  • Wwbn » Avideo » Version: 8.9
    cpe:2.3:a:wwbn:avideo:8.9
  • Wwbn » Avideo » Version: 8.9.1
    cpe:2.3:a:wwbn:avideo:8.9.1


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