The login for Hosting Controller 1.1 through 1.4.1 returns different error messages when a valid or invalid user is provided, which allows remote attackers to determine the existence of valid usernames and makes it easier to conduct a brute force attack.
http://www.securityfocus.com/bid/3971
http://www.iss.net/security_center/static/8006.php
http://marc.info/?l=bugtraq&m=101224151705897&w=2
http://hostingcontroller.com/English/patches/ForAll/index.html