This indicates an attack attempt against a Code Injection vulnerability in SugarCRM.
The vulnerability is due to insufficient validation of user input data while handling a HTTP request. A remote attacker may be able to exploit this to execute arbitrary code on vulnerable systems via a crafted HTTP request.
SugarCRM version 6.5.23 CE and prior
System Compromise: Remote attackers can execute arbitrary script code within the context of the target system
Apply the most recent upgrade or patch from the vendor.