BSK PDF Manager < 3.4.2 - Contributor+ Stored XSS via Shortcode

Description The plugin does not validate and escape some of its attributes for the bsk-pdfm-category-dropdown shortcode before outputting them back into the page, which could allow users with a role as low as a contributor to perform Stored Cross-Site Scripting attacks, which could be used against high-privilege users such as admins.