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Actions in the admin preset tool did not include the necessary token to prevent a CSRF risk.

Incorrect validation of allowed event types in a calendar web service made it possible for some users to create events with types/audiences they did not have permission to publish to.

Additional sanitizing was required when opening the equation editor to prevent a stored XSS risk when editing another user's equation.

Insufficient escaping of participants' names in the participants page table resulted in a stored XSS risk when interacting with some features.

The referrer URL used by MFA required additional sanitizing, rather than being used directly.

The Chat activity in Moodle 4.3.3 allows students to insert a potentially unwanted HTML A element or IMG element, or HTML content that leads to a performance degradation. NOTE: the vendor's Using_Chat page says "If you know some HTML code, you can us...

A Cross-Site Scripting (XSS) vulnerability exists in the way MOODLE 3.10.9 handles user input within the "GET /?lang=" URL parameter.

Separate Groups mode restrictions were not honored in the H5P attempts report, which would display users from other groups. By default this only provided additional access to non-editing teachers.

Separate Groups mode restrictions were not honored when performing a forum export, which would export forum data for all groups. By default this only provided additional access to non-editing teachers.

The link to update all installed language packs did not include the necessary token to prevent a CSRF risk.