EUVD-2026-17634
GHSA-v4h7-3x43-qqw4
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Lifecycle Timeline
3Description
WWBN AVideo is an open source video platform. In versions 26.0 and prior, the AVideo admin panel renders plugin configuration values in HTML forms without applying htmlspecialchars() or any other output encoding. The jsonToFormElements() function in admin/functions.php directly interpolates user-controlled values into textarea contents, option elements, and input attributes. An attacker who can set a plugin configuration value (either as a compromised admin or by chaining with CSRF on admin/save.json.php) can inject arbitrary JavaScript that executes whenever any administrator visits the plugin configuration page. At time of publication, there are no publicly available patches.
Analysis
Stored cross-site scripting (XSS) in WWBN AVideo 26.0 and prior allows unauthenticated attackers to inject malicious JavaScript into plugin configuration values via CSRF, or authenticated admins to directly inject code that executes in administrator browsers when accessing plugin configuration pages. The vulnerability exploits missing output encoding in the jsonToFormElements() function, enabling arbitrary JavaScript execution within the admin panel with impact to confidentiality and integrity.
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