The Tabs Shortcode and Widget WordPress plugin through 1.17 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/6e67bf7f-07e6-432b-a8f4-aa69299aecaf/