The Narrative Publisher WordPress plugin through 1.0.7 does not restrict write access to a REST-exposed post meta field or escape it when rendering, allowing users with contributor-level access and a…

Summary

The Narrative Publisher WordPress plugin through 1.0.7 does not restrict write access to a REST-exposed post meta field or escape it when rendering, allowing users with contributor-level access and above to store JavaScript that executes in the browser of any higher-privileged user who views the affected post.