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.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:N
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