This indicates an attack attempt to exploit a remote Code Execution Vulnerability in AlienVault OSSIM.
The vulnerability is due to insufficient sanitizing of user supplied inputs in the application. A remote attacker could exploit this to execute arbitrary code within the context of the application, via a crafted request.
AlienVault AlienVault 4.5 and prior
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor