Provide references for CVE-2015-2220.
Where can I find more information about CVE-2015-2220?
References are available at: http://www.securityfocus.com/bid/74857, http://www.securityfocus.com/archive/1/534687/100/0/threaded, https://wordpress.org/plugins/ninja-forms/changelog/, http://packetstormsecurity.com/files/130369/WordPress-Ninja-Forms-2.8.8-Cross-Site-Scripting.html.