https://www.wordfence.com/threat-intel/vulnerabilities/id/81eb8963-548f-4e94-83bd-266a19c09aab?source=cve
https://plugins.trac.wordpress.org/browser/woo-checkout-field-editor-pro/trunk/admin/class-thwcfd-admin.php#L426
https://plugins.trac.wordpress.org/changeset/3160299/
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