When explicitly enabling the feature flag DASHBOARD_CACHE (disabled by default), the system allowed for an unauthenticated user to access dashboard configuration metadata using a REST API Get endpoint. This issue affects Apache Superset version 1.5.2 and prior versions and version 2.0.0.
Apache Superset up to 1.5.1 allowed for authenticated users to access metadata information related to datasets they have no permission on. This metadata included the dataset name, columns and metrics.