Multiple directory traversal vulnerabilities in XOOPS 2.3.1, when register_globals is enabled, allow remote attackers to include and execute arbitrary local files via a .. (dot dot) in the xoopsConfig[language] parameter to (1) blocks.php and (2) main.php in xoops_lib/modules/protector/.
https://www.exploit-db.com/exploits/7380
https://exchange.xforce.ibmcloud.com/vulnerabilities/47153
http://www.xoops.org/modules/news/article.php?storyid=4563
http://www.xoops.org/modules/news/article.php?storyid=4540
http://www.securityfocus.com/bid/32685