Provide references for CVE-2021-43408.
Where can I find more information about CVE-2021-43408?
References are available at: https://plugins.trac.wordpress.org/browser/copy-delete-posts/tags/1.2.0/post/handler.php#L510, https://appcheck-ng.com/security-advisory-duplicate-post-wordpress-plugin-sql-injection-vulnerability/.