WWBN AVideo is an open source video platform. In versions 29.0 and below, the CORS origin validation fix in commit "986e64aad" is incomplete. Two separate code paths still reflect arbitrary "Origin" headers with credentials allowed for all "/api/*" endpoints: (1) "plugin/API/router.php" lines 4-8 unconditionally reflect any origin before application code runs, and (2) "allowOrigin(true)" called by "get.json.php" and "set.json.php" reflects any origin with "Access-Control-Allow-Credentials: true". An attacker can make cross-origin credentialed requests to any API endpoint and read authenticated responses containing user PII, email, admin status, and session-sensitive data. Commit 5e2b897ccac61eb6daca2dee4a6be3c4c2d93e13 contains a fix.