PlaySMS before 1.4.3 does not sanitize inputs from a malicious string.
packetstormsecurity.com/files/157106/PlaySMS-index.php-Unauthenticated-Template-Injection-Code-Execution.html
forum.playsms.org/t/playsms-1-4-3-has-been-released/2704
playsms.org/2020/02/05/playsms-1-4-3-has-been-released/
research.nccgroup.com/2020/02/11/technical-advisory-playsms-pre-authentication-remote-code-execution-cve-2020-8644/