CVE-2019-15029
FusionPBX 4.4.8 allows an attacker to execute arbitrary system commands by submitting a malicious command to the service_edit.php file (which will insert the malicious command into the database). To trigger the command, one needs to call the services.php file via a GET request with the service id followed by the parameter a=start to execute the stored command.
Source: CVE-2019-15029