Multiple PHP remote file inclusion vulnerabilities in P-Book 1.17 and earlier allow remote attackers to execute arbitrary PHP code via a URL in the pb_lang parameter to (1) admin.php and (2) pbook.php.
https://www.exploit-db.com/exploits/2691
https://exchange.xforce.ibmcloud.com/vulnerabilities/29651
http://www.vupen.com/english/advisories/2006/4291
http://www.securityfocus.com/archive/1/449106/100/200/threaded