This indicates an attack attempt to exploit an Remote Command Injection vulnerability in ZenTao Pro.
The vulnerability is due to insufficient sanitizing of user supplied inputs in the application. An authenticated remote attacker may be able to exploit this to execute arbitrary commands within the context of the application.
ZenTao Pro 8.8.2 and before
System Compromise: Remote attackers can gain control of vulnerable systems.
Currently we are unaware of any vendor supplied patch for this issue.