A Remote Code Execution vulnerability exists in Apache Struts2 when performing file upload based on Jakarta Multipart parser.
It is possible to perform a RCE attack with a malicious Content-Type value. If the Content-Type value isn't valid an exception is thrown which is then used to display an error message to a user.
Affected versions: Struts 2.3.5 - Struts 2.3.31, Struts 2.5 - Struts 2.5.10
- If you are using Jakarta based file upload Multipart parser, upgrade to Apache Struts version 2.3.32 or 18.104.22.168.