This indicates an attack attempt to exploit a Remote Command Execution Vulnerability in FusionPBX.
An authenticated remote attacker could exploit this vulnerability by sending a maliciously crafted request. Successful exploitation could result in the execution of arbitrary code in the security context of the target system.
FusionPBX version 4.4.1
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently we are unaware of any vendor supplied patch for this issue.