Directus is a real-time API and App dashboard for managing SQL database content. Prior to 11.17.0, aggregate functions (min, max) applied to fields with the conceal special type incorrectly return raw database values instead of the masked placeholder. When combined with groupBy, any authenticated user with read access to the affected collection can extract concealed field values, including static API tokens and two-factor authentication secrets from directus_users. This vulnerability is fixed in 11.17.0.