Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Sazzad Hu Testimonial Slider Shortcode allows Stored XSS.This issue affects Testimonial Slider Shortcode: from n/a through 1.1.9.

The Testimonial Slider Shortcode WordPress plugin before 1.1.9 does not validate and escape some of its shortcode attributes before outputting them back in the page, which could allow users with a role as low as contributor to perform Stored Cross-Site Scripting attacks which could be used against high privilege users such as admin