PHP remote file inclusion vulnerability in includes/common.php in Yaap 1.5 and earlier allows remote attackers to execute arbitrary PHP code via a URL in the root_path parameter, possibly related to the __autoload function.
https://www.exploit-db.com/exploits/3908
https://exchange.xforce.ibmcloud.com/vulnerabilities/34264
http://www.vupen.com/english/advisories/2007/1797