Provide references for CVE-2021-4356.
Where can I find more information about CVE-2021-4356?
References are available at: https://www.wordfence.com/threat-intel/vulnerabilities/id/79e2011c-5e4d-4d02-831f-6b4dcfcaa51e?source=cve, https://blog.nintechnet.com/wordpress-frontend-file-manager-plugin-fixed-multiple-critical-vulnerabilities/, https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2554359%40nmedia-user-file-uploader&new=2554359%40nmedia-user-file-uploader&sfp_email=&sfph_mail=.