This indicates an attack attempt to exploit an Arbitrary File Upload Vulnerability in Adobe ColdFusion.
The vulnerability is due to an error in the vulnerable application when handling File upload request. A remote attacker may be able to exploit this to upload arbitrary files and perform remote code execution within the context of the application, via uploading a malicious file.
Adobe ColdFusion 2016.0 Update 6 and prior
Adobe ColdFusion 2018.0.0.310739
Adobe ColdFusion 11 Update 14 and prior
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor: