Moodle Incorrect Permission Assignment for Critical Resource Vulnerability - CVE-2012-1160
Moodle before 2.2.2 has a permission issue in Forum Subscriptions where unenrolled users can subscribe/unsubscribe via mod/forum/index.php
Moodle before 2.2.2 has a permission issue in Forum Subscriptions where unenrolled users can subscribe/unsubscribe via mod/forum/index.php