The Kirki WordPress plugin before 6.3.2 does not validate the host of a URL it is given before fetching it, allowing users with editor-level access and above to make the site issue requests to internal services that are not otherwise reachable, and to tell which of those are live from the response.

The Kirki WordPress plugin before 6.3.2 does not validate the host of a URL it is given before fetching it, allowing users with editor-level access and above to make the site issue requests to internal services that are not otherwise reachable, and to tell which of those are live from the response.