The React Webcam WordPress plugin through 1.2.0 does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks.
https://wpscan.com/vulnerability/d268d7a3-82fd-4444-bc0e-27c7cc279b5a