CVE-2021-36851: Web-Settler Testimonial Slider

Medium severity, CVSS 5.4. EPSS: 0.6% chance of exploitation in the next 30 days.

Authenticated (editor or higher user role) Cross-Site Scripting (XSS) vulnerability in Web-Settler Testimonial Slider – Free Testimonials Slider Plugin (WordPress plugin) via parameters mpsp_posts_bg_color, mpsp_posts_description_color, mpsp_slide_nav_button_color.

Affected products

• Web-Settler Testimonial Slider: up to and including 3.5.8.3

Published 2022-04-04. Last modified 2026-06-17.