CVE-2026-89064

The All-in-One WP Migration and Backup plugin for WordPress is vulnerable to Insufficient Credential Protection in versions up to, and including, 7.110. This is due to the Ai1wm_Main_Controller::init() method — registered on the admin_init hook, which fires unauthenticated on admin-ajax.php and admin-post.php requests — reading $_SERVER['PHP_AUTH_USER'] and $_SERVER['PHP_AUTH_PW'] from any incoming request and writing them to the ai1wm_auth_header option via update_option() as a reversible base64-encoded string, with no capability check, nonce verification, is_user_logged_in() check, or confirmation that Basic authentication actually succeeded. This makes it possible for unauthenticated attackers to capture into the database, in reversible base64 form, any WordPress Application Password or HTTP Basic credential presented to /wp-admin/ by a legitimate integration, or to overwrite the stored credential with an attacker-chosen value by sending an anonymous request carrying a crafted Authorization: Basic header. This is particularly impactful in environments using WordPress Application Passwords for REST API or third-party integrations, as those credentials are transmitted as HTTP Basic auth to /wp-admin/ and will be silently harvested via this unauthenticated write path.