This indicates an attack attempt to exploit an Insecure Deserialization Vulnerability in Apache Software Foundation OFBiz.
This vulnerability is due to Java serialization issues when processing HTTP requests. A remote unauthenticated attacker can exploit this vulnerability by sending a crafted request. Successful exploitation would result in arbitrary code execution or arbitrary file creation or deletion.
Apache Software Foundation OFBiz 16.11.01 to 16.11.05
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.