Xr843

**Name of the Vulnerable Software and Affected Versions** Dify versions prior to 1.14.2 **Description** An authorization bypass exists in the file preview endpoint, allowing any authenticated user to read up to 3,000 characters of any uploaded document across all tenants and workspaces. This occurs because the system fails to verify ownership or workspace permissions when a file's UUID is provided. Attackers can exploit this by accessing the '/console/api/files/{file id}/preview' endpoint using an intercepted `file id`. Additionally, Dify Cloud permits unauthenticated free self-registration, which simplifies account creation for potential attackers. **Recommendations** Update to version 1.14.2 or later. As a temporary workaround, restrict access to the '/console/api/files/{file id}/preview' endpoint to minimize the risk of unauthorized document access.