Summary

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor Access to information you should not have access to when the permissions rely on $CURRENTUSER for filtering.

Details

The permission filters (i.e. usercreated IS $CURRENTUSER) are not properly checked when using GraphQL subscription resulting in unauthorized users getting event on their subscription which they should not be receiving according to the permissions. This can be any collection but out-of-the box the directususers collection is configured with such a permissions filter allowing you to get updates for other users when changes happen.

An example: graphql subscription { directususersmutated { event data { id lastaccess lastpage } } }

Patches https://github.com/directus/directus/pull/19155

Workarounds Disable GraphQL Subscriptions

References