Provide references for CVE-2021-4378.
Where can I find more information about CVE-2021-4378?
References are available at: https://www.wordfence.com/threat-intel/vulnerabilities/id/ed137706-1313-4bff-882b-13d9fa11498c?source=cve, https://blog.nintechnet.com/multiple-vulnerabilities-in-wordpress-wp-quick-frontend-editor-plugin-unpatched/.