A vulnerability was found in Moodle which exists due to insufficient validation of the HTTP request origin in course redirect URL. A user's CSRF token was unnecessarily included in the URL when being redirected to a course they have just restored. A remote attacker can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website. This flaw allows an attacker to perform cross-site request forgery attacks.

Enabling and disabling installed H5P libraries did not include the necessary token to prevent a CSRF risk.

The H5P activity attempts report did not filter by groups, which in separate groups mode could reveal information to non-editing teachers about attempts/users in groups they should not have access to.

A limited SQL injection risk was identified in the "browse list of users" site administration page.

A remote code execution risk when restoring backup files originating from Moodle 1.9 was identified.

Recursive rendering of Mustache template helpers containing user input could, in some cases, result in an XSS risk or a page failing to load.

It was possible for a student to view their quiz grade before it had been released, using a quiz web service.

Insufficient escaping of the LaTeX preamble made it possible for site administrators to read files available to the HTTP server system account.

An authentication bypass risk was identified in the external database authentication functionality, due to a type juggling vulnerability.

Insufficient capability checks made it possible for teachers to download users outside of their courses.