FreeBSD: VID-459df1ba-051c-11ea-9673-4c72b94353b5: wordpress -- multiple issues

wordpress developers reports: Props to Evan Ricafort for finding an issue where stored XSS (cross-site scripting) could be added via the Customizer. rops to J.D. Grimes who found and disclosed a method of viewing unauthenticated posts. Props to Weston Ruter for finding a way to create a stored XSS to inject Javascript into style tags. rops to David Newman for highlighting a method to poison the cache of JSON GET requests via the Vary: Origin header. Props to Eugene Kolodenker who found a server-side request forgery in the way that URLs are validated. Props to Ben Bidner of the WordPress Security Team who discovered issues related to referrer validation in the admin.