The Seriously Simple Podcasting WordPress plugin before 2.19.1 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 admins.
https://wpscan.com/vulnerability/128b150b-3950-4cc5-b46a-5707f7a0df00