CVE-2026-89256

High

Description

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.

SeverityHigh

CVSS8.7

Exploit probability—

ProductAVideo

PublishedSep 11, 2026

First seenSep 11, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Vendor advisories

github.com/WWBN/AVideo/security/advisories/GHSA-jggq-mm5m-r5wv

Affected products

Product	Affected versions	Fixed in
WWBN AVideo	v ≤ c3edcc274c389816d434acadac07ee78eaf330c1	—

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