The Royal MCP WordPress plugin before 1.5.10 does not perform object-level or post-type authorisation checks in one of its search tools, allowing authenticated users such as a subscriber to disclose the title and content of non-public entries, including personal data stored by a companion Royal MCP WordPress plugin before 1.5.10.
https://wpscan.com/vulnerability/474153af-b440-4e89-a27b-131e94c4b63e/