Provide references for CVE-2019-11557.
Where can I find more information about CVE-2019-11557?
References are available at: https://lists.openwall.net/full-disclosure/2019/04/23/1, https://wordpress.org/plugins/contact-form-builder/#developers, http://seclists.org/fulldisclosure/2019/Apr/35, https://wpvulndb.com/vulnerabilities/9260.