Auth.js SDK has Improper Permission Checking

Description

Under specific preconditions, the Auth0.js SDK may improperly return user profile information using a valid access token when a specifically crafted invalid ID token is provided.

Am I Affected?

Users are affected if they meet each of the following preconditions:

• Applications built using Auth0.js version between 8.11.0 and 9.32.0
• The application’s access control relies on rules defined in Auth0 Actions.

Affected product and versions

auth0.js SDK v8.11.0 to v9.32.0

Resolution

Upgrade auth0/auth0.js to v10.0.0 or greater.

Acknowledgements

Okta would like to thank Quan Le (@aleister1102) for their discovery and responsible disclosure.