GHSA-9V82-XRM4-MP52 StudioCMS: IDOR in User Notification Preferences Allows Any Authenticated User to Modify Any User's Settings

Summary The updateUserNotifications endpoint accepts a user ID from the request payload and uses it to update that user's notification preferences. It checks that the caller is logged in but never verifies that the caller owns the target account id !== userData.user.id. Any authenticated visitor...