Moodle Permissions Privileges and Access Controls Vulnerability - CVE-2015-3179
login/confirm.php in Moodle through 2.5.9 2.6.x before 2.6.11 2.7.x before 2.7.8 and 2.8.x before 2.8.6 allows remote authenticated users to bypass intended login restrictions by leveraging access to an unconfirmed suspended account.