Justice Guestbook 1.3 allows remote attackers to obtain the full installation path via a direct request to cfooter.php3, which leaks the path in an error message.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2003-1525
http://www.securitytracker.com/id?1006412
http://www.securityfocus.com/bid/7234
http://www.securityfocus.com/archive/1/316745/30/25280/threaded