Provide references for CVE-2011-4581.
Where can I find more information about CVE-2011-4581?
References are available at: http://git.moodle.org/gw?p=moodle.git%3Ba=commit%3Bh=140af2a0f0a4598bf568b9ae182cb81eb583edeb, https://bugzilla.redhat.com/show_bug.cgi?id=761248, http://moodle.org/mod/forum/discuss.php?d=191747.