Coppermine Photo Gallery before 1.5.20 allows remote attackers to obtain sensitive information via (1) a direct request to plugins/visiblehookpoints/index.php, an invalid (2) page or (3) cat parameter to thumbnails.php, an invalid (4) page parameter to usermgr.php, or an invalid (5) newer_than or (6) older_than parameter to search.inc.php, which reveals the installation path in an error message.
http://www.securityfocus.com/bid/52818
http://www.openwall.com/lists/oss-security/2012/03/30/6
http://www.openwall.com/lists/oss-security/2012/03/30/5
http://forum.coppermine-gallery.net/index.php/topic%2C74682.0.html