Provide references for CVE-2021-39341.
Where can I find more information about CVE-2021-39341?
References are available at: https://www.wordfence.com/blog/2021/10/1000000-sites-affected-by-optinmonster-vulnerabilities/, https://wordfence.com/vulnerability-advisories/#CVE-2021-39341, https://plugins.trac.wordpress.org/browser/optinmonster/trunk/OMAPI/RestApi.php?rev=2606519#L1460.