The plugin does not sanitise and escape the urls parameter in its the_champ_sharing_count AJAX action (available to both unauthenticated and authenticated users) before outputting it back in the response, leading to a Reflected Cross-Site Scripting issue. Note: Vendor was notified on November 18th, 2021.
https://example.com/wp-admin/admin-ajax.php?action=the_champ_sharing_count&urls[]=%3Cimg%20src%20onerror=alert(`XSS`)%3E
Krzysztof Zając
Krzysztof Zając
Yes
2022-03-15 (about 10 months ago)
2022-03-15 (about 10 months ago)
2022-04-09 (about 9 months ago)