SQL injection vulnerability in classes/class_session.php in Invision Power Board (IPB) 2.1 up to 2.1.6 allows remote attackers to execute arbitrary SQL commands via the CLIENT_IP parameter.
https://www.exploit-db.com/exploits/2010
https://exchange.xforce.ibmcloud.com/vulnerabilities/27753
http://www.vupen.com/english/advisories/2006/2810