CVE-2012-6562
engine/lib/users.php in Elgg before 1.8.5 does not properly specify permissions for the useradd action, which allows remote attackers to create arbitrary accounts.
Date published : 2013-05-23
http://www.securityfocus.com/bid/53623
http://blog.elgg.org/pg/blog/evan/read/209/elgg-185-released