CVE-2016-2821

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-06-13 · updated 2026-06-17

Description

Use-after-free vulnerability in the mozilla::dom::Element class in Mozilla Firefox before 47.0 and Firefox ESR 45.x before 45.2, when contenteditable mode is enabled, allows remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) by triggering deletion of DOM elements that were created in the editor.

Affected products

Canonical Ubuntu Linux: 12.04, 14.04, 15.10, 16.04
Debian Linux: 8.0
Mozilla Firefox: through 46.0.1; 45.1.0, 45.1.1
openSUSE Leap: 42.1
Opensuse: 13.1, 13.2

References

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/mfsa2016-51.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
https://access.redhat.com/errata/RHSA-2016:1217
https://bugzilla.mozilla.org/show_bug.cgi?id=1271460
http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00014.html

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