Provide references for CVE-2021-39319.
Where can I find more information about CVE-2021-39319?
References are available at: https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39319, https://plugins.trac.wordpress.org/browser/duofaq-responsive-flat-simple-faq/tags/1.4.8/duogeek/duogeek-panel.php#L388.