A type juggling vulnerability in the component /auth/fn.php of PlaySMS v1.4.5 and earlier allows attackers to bypass authentication.
https://github.com/playsms/playsms/commit/dd23673a00c052e113c6d44eb629dc355d3c0605
https://gist.github.com/tonino-25/d2316094cc751cc7a8e2c1ae6dbecfe9