Directory traversal vulnerability in editor_registry.php in XOOPS 2.2.3 allows remote attackers to read or include arbitrary local files via a .. (dot dot) in the xoopsConfig[language] parameter.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2005-3677
http://www.vupen.com/english/advisories/2005/2428
http://www.securityfocus.com/bid/15406/