Provide references for CVE-2021-39321.
Where can I find more information about CVE-2021-39321?
References are available at: https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39321, https://www.wordfence.com/blog/2021/10/vulnerability-patched-in-sassy-social-share-plugin/, https://plugins.trac.wordpress.org/changeset/2600464/sassy-social-share/trunk/admin/class-sassy-social-share-admin.php.