In Webmin version 1.984, any authenticated low privilege user without access rights to the File Manager module could interact with file manager functionalities such as downloading files from remote URLs and changing file permissions. It is possible to achieve Remote Code Execution via a crafted .cgi file by chaining those functionalities in the file manager.
Linux
To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':
Time is precious, so I don’t want to do something manually that I can automate. Leveraging the Metasploit Framework when automating any task keeps us from having to re-create the wheel as we can use the existing libraries and focus our efforts where it matters.
– Jim O’Gorman | President, Offensive Security