Moodle Permissions Privileges and Access Controls Vulnerability - CVE-2012-4402
webservice/lib.php in Moodle 2.1.x before 2.1.8 2.2.x before 2.2.5 and 2.3.x before 2.3.2 does not properly restrict the use of web-service tokens which allows remote authenticated users to run arbitrary external-service functions via a token intended for only one service.