CVE-2026-88866
WWBN AVideo through commit c3edcc274c389816d434acadac07ee78eaf330c1 contains a stored cross-site scripting vulnerability in the LoginControl plugin that fails to encode the User-Agent header before storing it in login history. Attackers with any valid login account can inject malicious scripts in the User-Agent header that execute in administrator browsers when viewing the Login History page, allowing script execution within the administrator session.
Scoring
- Severity
- CRITICAL
- CVSS base score
- 9.3
- CVSS vector
- 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
- EPSS probability
- 0.31%
- CWE
- CWE-79
- Published
- 2026-09-10
- Last modified
- 2026-09-15
Affected products
- WWBN AVideo
Weakness type
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- CVE-2026-89256 — AVideo Bookmark Plugin Stored XSS via Chapter Names
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- CVE-2026-89254 — AVideo CustomizeUser Stored XSS via field_name Parameter
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