Moodle 2.2.x before 2.2.5 and 2.3.x before 2.3.2 allows remote authenticated users to bypass intended capability restrictions and perform certain topic changes by leveraging course-editing capabilities.
http://openwall.com/lists/oss-security/2012/09/17/1
http://moodle.org/mod/forum/discuss.php?d=211556
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-28207