CVE-2026-88866

critical · 9.3

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.

9.3

CVSS

0.4%

EPSS (exploit prob.)

38th

EPSS percentile

2026-09-10

Published

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Weaknesses

CWE-79

References

https://github.com/WWBN/AVideo/security/advisories/GHSA-wg67-62q3-2m33
https://www.vulncheck.com/advisories/wwbn-avideo-logincontrol-stored-xss-via-user-agent-header
https://github.com/WWBN/AVideo/security/advisories/GHSA-wg67-62q3-2m33

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-88866