The file_browser component in Moodle 2.0.x before 2.0.5 and 2.1.x before 2.1.2 does not properly restrict access to category and course data, which allows remote attackers to obtain potentially sensitive information via a request for a file.
https://bugzilla.redhat.com/show_bug.cgi?id=747444
http://moodle.org/mod/forum/discuss.php?d=188311
http://git.moodle.org/gw?p=moodle.git%3Ba=commit%3Bh=f6b07c4da54a9db24723beb147e8a19a3d487e00