CVE-2026-89256

9.3 criticalEPSS 0.4%

Critical (9.3). EPSS 0.4% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

9.3 critical

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

CVSS 3.1

8.7 high

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 30% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2026-09-11
Modified: 2026-09-11
Record from: the NVD, synced 2026-10-19

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

Check your stack JSON