Description
An attacker can manipulate file upload params to enable paths traversal and under some circumstances this can lead to uploading a malicious file which can be used to perform Remote Code Execution. Users are recommended to upgrade to versions Struts 2.5.33 or Struts 6.3.0.2 or greater to fix this issue.
References
https://lists.apache.org/thread/yh09b3fkf6vz5d6jdgrlvmg60lfwtqhj
https://www.openwall.com/lists/oss-security/2023/12/07/1
http://packetstormsecurity.com/files/176157/Struts-S2-066-File-Upload-Remote-Code-Execution.html
https://security.netapp.com/advisory/ntap-20231214-0010/