The Logo Showcase with Slick Slider WordPress plugin before 2.0.1 does not have CSRF check in the lswss_save_attachment_data AJAX action, allowing attackers to make a logged in high privilege user, change title, description, alt text, and URL of arbitrary uploaded media.

The Logo Showcase with Slick Slider WordPress plugin before 1.2.5 does not have CSRF and authorisation checks in the lswss_save_attachment_data AJAX action, allowing any authenticated users, such as Subscriber, to change title, description, alt text, and URL of arbitrary uploaded media.

The Logo Showcase with Slick Slider WordPress plugin before 1.2.4 does not sanitise the Grid Settings, which could allow users with a role as low as Author to perform stored Cross-Site Scripting attacks via post metadata of Grid logo showcase.