Security announcements | Moodle.org

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.

A session hijack risk was identified in the Shibboleth authentication plugin. (Note: Shibboleth authentication is disabled by default in Moodle.)

In some circumstances, email notifications of messages could have the link back to the original message hidden by HTML, which may pose a phishing risk.

Users' names required additional sanitizing in the account confirmation email, to prevent a self-registration phishing risk.

Note: If you have customised the language string emailconfirmation, you will need to edit the customisation and remove the placeholder {$a->firstname}.

ID numbers exported in HTML data formats required additional sanitizing to prevent a local stored XSS risk. Note that the XSS was part of the locally downloaded file and not on the Moodle site's domain.

Insufficient capability checks made it possible to remove other users' calendar URL subscriptions.

ID numbers displayed in the quiz override screens required additional sanitizing to prevent a stored XSS risk.

ID numbers displayed in the web service token list required additional sanitizing to prevent a stored XSS risk.

Insufficient capability checks meant message deletions were not limited to the current user.