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