CVE-2026-33501: AVideo has Unauthenticated Information Disclosure of User Group Permission Mappings via Permissions Plugin

The endpoint plugin/Permissions/View/Users_groups_permissions/list.json.php lacks any authentication or authorization check, allowing unauthenticated users to retrieve the complete permission matrix mapping user groups to plugins. All sibling endpoints in the same directory (add.json.php, delete.json.php, index.php) properly require User::isAdmin(), indicating this is an oversight.