SSL Wireless SMS Notification for WordPress is vulnerable to Authentication Bypass in all...

SSL Wireless SMS Notification for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 3.8.1. The public final_login_ajax_action handler resolves a user and issues an authenticated session by matching the wp_sslcare_otp table on only the attacker-supplied phone and cap_data, without verifying the SMS OTP or any server-side single-use state. Because cap_data was chosen by the attacker in the public otp_login_ajax_action step (which stores the row before sending the SMS), the finalize step trivially matches and the user is looked up solely by the sslcare_login_phone meta. This makes it possible for unauthenticated attackers who know a phone-linked user's number to take over that account.