Direct static code injection vulnerability in config.php in vscripts (aka Kuba Kunkiewicz) [V]Book (aka VBook) 2.0 allows remote administrators to execute arbitrary PHP code into the config file, which is included other [V]Book scripts.
https://exchange.xforce.ibmcloud.com/vulnerabilities/25522
http://www.vupen.com/english/advisories/2006/1174
http://www.securityfocus.com/archive/1/430624/100/0/threaded