Provide references for CVE-2021-4450.
Where can I find more information about CVE-2021-4450?
References are available at: https://www.wordfence.com/threat-intel/vulnerabilities/id/a321b112-ce37-4a0e-800f-f3feef6ac799?source=cve, https://plugins.trac.wordpress.org/changeset/2644269.