This indicates an attack attempt against a Remote Code Execution vulnerability in Spring Cloud Function when using routing functionality.
The vulnerability is caused by improper handling of a crafted HTTP request. A remote authenticated attacker may be able to exploit this to execute arbitrary remote code within the context of the application, via a crafted HTTP request.
In Spring Cloud Function versions 3.2.2, 3.1.6, and older versions, it is possible for an attacker to provide a specially crafted malicious expression that may result in remote code execution and access to local resources. With CVSS base score of 9.8 and publicly available proof of concept, this vulnerability should be seriously attended.
Spring Cloud Function versions 3.1.6, 3.2.2 and older unsupported versions
System Compromise: Remote attackers can gain control of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.