CVE-2015-9420
The soundcloud-is-gold plugin before 2.3.2 for WordPress has XSS via the wp-admin/admin-ajax.php?action=get_soundcloud_player id parameter.
Date published : 2019-09-25
http://cinu.pl/research/wp-plugins/mail_9acbc3ef2dd43bfb78b6b3dcf6c5ef01.html
https://wordpress.org/plugins/soundcloud-is-gold/#developers