Directory traversal vulnerability in index.php in phpPaleo 4.8b155 and earlier allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the lang parameter.
http://www.securityfocus.com/bid/52530
http://www.openwall.com/lists/oss-security/2012/03/16/3
http://www.openwall.com/lists/oss-security/2012/03/15/11