This module exploits a remote code execution vulnerability in Apache Struts version 2.3 - 2.3.4, and 2.5 - 2.5.16. Remote Code Execution can be performed via an endpoint that makes use of a redirect action. Note that this exploit is dependant on the version of Tomcat running on the target. Versions of Tomcat starting with 7.0.88 currently don't support payloads larger than ~7.5kb. Windows Meterpreter sessions on Tomcat >=7.0.88 are currently not supported. Native payloads will be converted to executables and dropped in the server's temp dir. If this fails, try a cmd/* payload, which won't have to write to the disk.
To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':
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