Incorrect Default Permissions
Moodle before 2.2.2 has a default repository capabilities issue where all repositories are viewable by all users by default
Moodle Users Can Bypass Deleted Status
The webservices functionality in Moodle 2.0.x before 2.0.7, 2.1.x before 2.1.4, and 2.2.x before 2.2.1 allows remote authenticated users to bypass the deleted status and continue using a server via a token.