The Polo Video Gallery – Best wordpress video gallery plugin WordPress plugin through 1.2 does not sanitise or validate the parameters from its shortcode, allowing users with a role as low as contributor to set Cross-Site Scripting payload in them which will be triggered in the page/s with the embed malicious shortcode
https://wpscan.com/vulnerability/fd312bfd-7c98-4682-877d-846442e9c6a2