Directory traversal vulnerability in FlatNuke 2.5.6 and possibly earlier allows remote attackers to read arbitrary files via ".." sequences and "%00" (trailing null byte) characters in the id parameter to the read mod in index.php.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2005-2814
http://www.securityfocus.com/bid/15796
http://www.securityfocus.com/bid/14702
http://www.securityfocus.com/archive/1/419107/100/0/threaded
http://securitytracker.com/id?1015339
http://securitytracker.com/id?1014824