This indicates an attack attempt to exploit an Arbitrary File Upload Vulnerability in Advantech WISE-PaaS/RMM.
The vulnerability is due to insufficient sanitizing of user supplied inputs in the application. A remote unauthenticated attacker could exploit this vulnerability by uploading and accessing a specially crafted JSP or any other executable files such as WAR or EAR files, which can lead to arbitrary code execution with SYSTEM privileges.
Advantech WISE-PaaS/RMM 3.3.29 and prior
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.