In Moodle 2.x and 3.x, an unenrolled user still receives event monitor notifications even though they can no longer access the course.

In Moodle 2.x and 3.x, web service tokens are not invalidated when the user password is changed or forced to be changed.

lib/ajax/getnavbranch.php in Moodle through 2.6.11, 2.7.x before 2.7.13, 2.8.x before 2.8.11, 2.9.x before 2.9.5, and 3.0.x before 3.0.3, when the forcelogin feature is enabled, allows remote attackers to obtain sensitive category-detail information from the navigation branch by leveraging the guest role for an Ajax request.

Cross-site request forgery (CSRF) vulnerability in mod/assign/adminmanageplugins.php in Moodle through 2.6.11, 2.7.x before 2.7.13, 2.8.x before 2.8.11, 2.9.x before 2.9.5, and 3.0.x before 3.0.3 allows remote attackers to hijack the authentication of administrators for requests that manage Assignment plugins.

calendar/externallib.php in Moodle through 2.6.11, 2.7.x before 2.7.13, 2.8.x before 2.8.11, 2.9.x before 2.9.5, and 3.0.x before 3.0.3 provides calendar-event data without considering whether an activity is hidden, which allows remote authenticated users to obtain sensitive information via a web-service request.

Cross-site scripting (XSS) vulnerability in the advanced-search feature in mod_data in Moodle through 2.6.11, 2.7.x before 2.7.13, 2.8.x before 2.8.11, 2.9.x before 2.9.5, and 3.0.x before 3.0.3 allows remote attackers to inject arbitrary web script or HTML via a crafted field in a URL, as demonstrated by a search form field.

admin/tool/monitor/lib.php in Event Monitor in Moodle 2.8.x before 2.8.11, 2.9.x before 2.9.5, and 3.0.x before 3.0.3 does not consider the moodle/course:viewhiddencourses capability, which allows remote authenticated users to discover hidden course names by subscribing to a rule.

Multiple cross-site scripting (XSS) vulnerabilities in auth/db/auth.php in Moodle through 2.6.11, 2.7.x before 2.7.13, 2.8.x before 2.8.11, 2.9.x before 2.9.5, and 3.0.x before 3.0.3 allow remote attackers to inject arbitrary web script or HTML via an external DB profile field.

The save_submission function in mod/assign/externallib.php in Moodle through 2.6.11, 2.7.x before 2.7.13, 2.8.x before 2.8.11, 2.9.x before 2.9.5, and 3.0.x before 3.0.3 allows remote authenticated users to bypass intended due-date restrictions by leveraging the student role for a web-service request.

Moodle through 2.6.11, 2.7.x before 2.7.13, 2.8.x before 2.8.11, 2.9.x before 2.9.5, and 3.0.x before 3.0.3 does not properly restrict links, which allows remote attackers to obtain sensitive URL information by reading a Referer log.