Server-Side Request Forgery (SSRF) in AVideo - CVE-2026-91966
Published: November 11, 2026
Vulnerability identifier: #VU165932
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N]
CVE-ID: CVE-2026-91966
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to probe internal host and port reachability through blind server-side request forgery.
The vulnerability exists due to missing SSRF validation in AVideo's WWBNIndex::check_site_availability() when pre-authentication gates validate SERVER_NAME but fetch the client-controlled HTTP_HOST. A remote attacker can send requests with a crafted Host header to /plugin/WWBNIndex/submitIndex.php or /plugin/WWBNIndex/ajax.php to infer internal service availability from status-dependent behavior and timing, including through up to 10 redirects.
Affected software
AVideo
How to mitigate CVE-2026-91966
Install security update from vendor's website.
AVideo - update to 29.1.0