PHP remote file inclusion vulnerability in includes/functions_kb.php in the phpBB XS 2 (Spain version) allows remote attackers to execute arbitrary PHP code via a URL in the phpbb_root_path parameter, a different vector than CVE-2006-4780 or CVE-2006-4893.
https://exchange.xforce.ibmcloud.com/vulnerabilities/29250
http://www.vupen.com/english/advisories/2006/3843
http://www.securityfocus.com/bid/20251
http://www.securityfocus.com/archive/1/447292/100/0/threaded