WP Responsive Testimonials Slider And Widget <= 1.5 - Contributor+ Stored XSS

The plugin does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks

PoC

[testimonials_slider autoplay=“1}); alert(1); jQuery(‘#xss’).slick({xssVulnerable:‘yes’”]