This indicates an attack attempt to exploit a remote Code Execution Vulnerability in PineApp Mail-SeCure Server.
The vulnerability is due to insufficient sanitizing of user supplied inputs in test_li_connection.php of the application. A remote attacker could exploit this to execute arbitrary code execution within the context of the root, via a crafted HTTP request.
PineApp Mail-SeCure 3.70
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently we are unaware of any vendor supplied patch for this issue.