Mozilla Firefox before 47.0 and Firefox ESR 45.x before 45.2 do not ensure that the user approves the fullscreen and pointerlock settings, which allows remote attackers to cause a denial of service (UI outage), or conduct clickjacking or spoofing attacks, via a crafted web site.
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00014.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00016.html
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00055.html
http://www.debian.org/security/2016/dsa-3600
http://www.mozilla.org/security/announce/2016/mfsa2016-58.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://www.securityfocus.com/bid/91075
http://www.securitytracker.com/id/1036057
http://www.ubuntu.com/usn/USN-2993-1
Source: MITRE
Published: 2016-06-13
Updated: 2018-10-30
Type: CWE-254
Base Score: 5.8
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:P
Impact Score: 4.9
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 8.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:H
Impact Score: 5.3
Exploitability Score: 2.8
Severity: HIGH