The Shortcode for Font Awesome WordPress plugin before 1.4.1 does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embedded, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks.
https://wpscan.com/vulnerability/5ccfee43-920d-4613-b976-2ea8966696ba