code_exec1.rb

#!/usr/bin/ruby

require 'msf/core'

class MetasploitModule < Msf::Exploit::Remote

Rank = ExcellentRanking

include Msf::Exploit::Remote::HttpClient

def initialize(info = {})
super(update_info(info,
  'Name' => 'Bash Command Execution in Target URLs',
  'Description' => % q {
    This module exploits a vulnerability in websites that contain vulnerable parameters and functions.It allows an attacker to execute arbitrary bash commands on the target system.
  },
  'License' => MSF_LICENSE,
  'Author' => ['Your Name <you@example.com>'], 
    ['URL', 'http://example.com']
  ], 
      'Space' => 1024,
    if true(
      default)
  },


  'Targets' => [
    ["Automatic", {}]
  ],


))

register_options([OptString.new('TARGETURI', [true, "The base path to the web application", "/"])])

deregister_options('VHOST') 

end

def check
for vulnerability goes here(e.g., version detection)

end

def exploit 

endend