PHP remote file inclusion vulnerability in BlackBoard 1.5.1 allows remote attackers to execute arbitrary PHP code by modifying the libpath parameter (incorrectly called "libpach") to reference a URL on a remote web server that contains _more.php, as demonstrated using checkdb.inc.php.
https://exchange.xforce.ibmcloud.com/vulnerabilities/17637
http://www.securityfocus.com/bid/11336
http://secunia.com/advisories/12757