Mozilla Firefox before 48.0 does not properly restrict drag-and-drop (aka dataTransfer) actions for file: URIs, which allows user-assisted remote attackers to access local files via a crafted web site.
lists.opensuse.org/opensuse-security-announce/2016-08/msg00004.html
lists.opensuse.org/opensuse-security-announce/2016-08/msg00029.html
www.mozilla.org/security/announce/2016/mfsa2016-81.html
www.securityfocus.com/bid/92260
www.securitytracker.com/id/1036508
www.ubuntu.com/usn/USN-3044-1
bugzilla.mozilla.org/show_bug.cgi?id=1226977
security.gentoo.org/glsa/201701-15