PHP remote file inclusion vulnerability in master.php in OpenPHPNuke and 2.3.3 earlier allows remote attackers to execute arbitrary PHP code via a URL in the root_path parameter.
https://www.exploit-db.com/exploits/1727
https://exchange.xforce.ibmcloud.com/vulnerabilities/26183
http://www.vupen.com/english/advisories/2006/1575
http://www.securityfocus.com/bid/17772
http://www.openphpnuke.com/system/article/index.php?opnparams=B3YBZAI3BWgEbFU0