The Team Circle Image Slider With Lightbox plugin for WordPress is vulnerable to Cross-Site Request Forgery in version 1.0. This is due to missing or incorrect nonce validation on the circle_thumbnail_slider_with_lightbox_image_management_func() function. This makes it possible for unauthenticated attackers to edit image data which can be used to inject malicious JavaScript, along with deleting images, and uploading malicious files via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

The Team Circle Image Slider With Lightbox plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the ‘search_term’ parameter in versions up to, and including, 1.0.17 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

The Team Circle Image Slider With Lightbox WordPress plugin before 1.0.16 does not sanitize and escape the order_pos parameter before outputting it back in an admin page, leading to a Reflected Cross-Site Scripting.