The wp-greet plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 6.2. This is due to missing or incorrect nonce validation on a function. This makes it possible for unauthenticated attackers to update settings and inject malicious web scripts via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.
https://wordpress.org/plugins/wp-greet/#developers
https://plugins.trac.wordpress.org/changeset/3225035/
https://plugins.trac.wordpress.org/browser/wp-greet/trunk/wpg-form.php#L253
https://plugins.trac.wordpress.org/browser/wp-greet/trunk/wpg-admin.php#L350
https://plugins.trac.wordpress.org/browser/wp-greet/trunk/wpg-admin.php#L124