FlatNuke 2.5.3 allows remote attackers to obtain sensitive information via invalid parameters to certain scripts, which leaks the web document root in an error message.
http://www.vupen.com/english/advisories/2005/0697
http://secwatch.org/advisories/secwatch/20050604_flatnuke.txt
http://securitytracker.com/id?1014114
http://secunia.com/advisories/15603
http://flatnuke.sourceforge.net/index.php?mod=read&id=1117979256