Launchpad.net

CVE 2014-7834

mod/forum/externallib.php in Moodle 2.6.x before 2.6.6 and 2.7.x before 2.7.3 does not verify group permissions, which allows remote authenticated users to access a forum via the forum_get_discussions web service.

See the CVE page on Mitre.org for more details.