CVE-2026-89256

CVSS 9.3 (critical) · published 2026-09-11

AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a stored cross-site scripting vulnerability in the Bookmark plugin where chapter names are not encoded before being concatenated into public watch-page HTML. A video owner can inject malicious scripts via the bookmark name parameter, and every visitor of that video executes the payload in the AVideo origin.

Weakness: CWE-79

Source: NVD CVE-2026-89256

References

• https://github.com/WWBN/AVideo/security/advisories/GHSA-jggq-mm5m-r5wv
• https://www.vulncheck.com/advisories/avideo-bookmark-plugin-stored-xss-via-chapter-names
• https://github.com/WWBN/AVideo/security/advisories/GHSA-jggq-mm5m-r5wv

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