Open redirect vulnerability in the header function in adclick.php in OpenX 2.8.10 and earlier allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a URL in the (1) dest parameter to adclick.php or (2) _maxdest parameter to ck.php.
https://exchange.xforce.ibmcloud.com/vulnerabilities/97621
https://euvd.enisa.europa.eu/vulnerability/EUVD-2014-2270
http://www.tetraph.com/blog/cves/cve-2014-2230-openx-open-redirect-vulnerability-2
http://seclists.org/fulldisclosure/2014/Oct/72
http://packetstormsecurity.com/files/128718/OpenX-2.8.10-Open-Redirect.html