CVE-2011-4304
The chat functionality in Moodle 2.0.x before 2.0.5 and 2.1.x before 2.1.2 allows remote authenticated users to discover the name of any user via a beep operation.
Date published : 2012-07-11
http://git.moodle.org/gw?p=moodle.git;a=commit;h=d0157d827bc254ba386a5e5b41b13be2698ee76e