Simple Download Monitor < 3.9.11 - Contributor+ Stored Cross-Site Scripting via Shortcodes

The Simple Download Monitor WordPress plugin before 3.9.11 could allow users with a role as low as Contributor to perform Stored Cross-Site Scripting attack via 1) "color" or "css_class" argument of sdm_download shortcode, 2) "class" or "placeholder" argument of sdm_search_form shortcode.