Provide references for CVE-2019-16966.
Where can I find more information about CVE-2019-16966?
References are available at: https://issues.freepbx.org/browse/FREEPBX-20437, https://github.com/FreePBX/contactmanager/commit/99e5aa0050224289cfe64c9036f38ce2531bf633, https://resp3ctblog.wordpress.com/2019/10/19/freepbx-xss-1/.