CVE-2011-5061
functions.php in WHMCompleteSolution (WHMCS) 4.0.x through 5.0.x allows remote attackers to trigger arbitrary code execution in the Smarty templating system by submitting a crafted ticket, related to improper handling of characters in the subject field.
Date published : 2012-01-13
http://forum.whmcs.com/showthread.php?t=43462
http://www.webhostingtalk.com/showpost.php?p=7848685&postcount=35