Open redirect vulnerability in claroline/redirector.php in Claroline before 1.8.10 allows remote attackers to redirect users to arbitrary web sites and conduct phishing attacks via a URL in the url parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/43854
http://www.securityfocus.com/archive/1/494539/100/0/threaded
http://wiki.claroline.net/index.php/Changelog_1.8.x#Modification_between_claroline_1.8.9_and_1.8.10
http://sourceforge.net/project/shownotes.php?release_id=613634