by Kastro
Paper/Archive/CVE-2026-89256

CVE-2026-89256

WWBN AVideo — AVideo Bookmark Plugin Stored XSS via Chapter Names

EPSS 0.4%public exploitCVSS 9.3
critical.is priorityof 100
44
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 30.5.305 × 206.1Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
AVideo≤ c3edcc274c389816d434acadac07ee78eaf330c1–CNA

Scores by source

VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
VulnCheck (CNA)8.7CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

exploitgithub.com/WWBN/AVideo/security/advisories/GHSA-jggq-mm5m-r5wvwriteupvulncheck.com/advisories/avideo-bookmark-plugin-stored-xss-via-chapter-names