PHP remote file inclusion vulnerability in language/lang_german/lang_main_album.php in phpBB Plus 1.53, and 1.53a before 20070922, allows remote attackers to execute arbitrary PHP code via a URL in the phpbb_root_path parameter.
https://www.exploit-db.com/exploits/4434
https://exchange.xforce.ibmcloud.com/vulnerabilities/36697
http://www.vupen.com/english/advisories/2007/3247
http://www.phpbb2.de/ftopic45218.html