Provide references for CVE-2021-4411.
Where can I find more information about CVE-2021-4411?
References are available at: https://www.wordfence.com/threat-intel/vulnerabilities/id/a1fbb3a6-fcc2-47c5-a086-331e69292add?source=cve, https://blog.nintechnet.com/25-wordpress-plugins-vulnerable-to-csrf-attacks/, https://blog.nintechnet.com/more-wordpress-plugins-and-themes-vulnerable-to-csrf-attacks/, https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-3/, https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-2/, https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-1/, https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-5/, https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-4/, https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2551919%40wp-easy-pay&new=2551919%40wp-easy-pay&sfp_email=&sfph_mail=, https://plugins.trac.wordpress.org/browser/wp-easy-pay/trunk/wpep_setup.php?rev=2426641#L219.