Provide references for CVE-2019-15867.
Where can I find more information about CVE-2019-15867?
References are available at: https://wpvulndb.com/vulnerabilities/9317, https://wordpress.org/plugins/slick-popup/#developers, https://www.wordfence.com/blog/2019/05/privilege-escalation-flaw-present-in-slick-popup-plugin/.