PHP remote file inclusion vulnerability in mods/iai/includes/constants.php in the PlusXL 20_272 and earlier phpBB module allows remote attackers to execute arbitrary PHP code via a URL in the phpbb_root_path parameter.
https://www.exploit-db.com/exploits/2538
https://exchange.xforce.ibmcloud.com/vulnerabilities/29520
http://www.vupen.com/english/advisories/2006/4038
http://www.securityfocus.com/archive/1/448581/100/0/threaded