CVE-2016-2821

high

Published 2016-06-13 · Modified 2026-05-06

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CVSS v3

7.5

CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v4 NEW

—

not yet in upstream

VIR risk

7.5

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.

Predictions

Exploit likelihood

83%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

OS	Version	Status	Fixed in
sles		affected
debian	sid	fixed	`47.0-1`
debian	trixie	fixed	`45.2.0esr-1`
debian	bookworm	fixed	`45.2.0esr-1`
debian	bullseye	fixed	`45.2.0esr-1`
debian	forky	fixed	`45.2.0esr-1`
ubuntu	12.04	affected
ubuntu	14.04	affected
ubuntu	15.10	affected
ubuntu	16.04	affected
debian	8.0	affected
suse	42.1	affected
suse	13.1	affected
suse	13.2	affected

Application impact

Vendor	Product	Versions
mozilla	firefox	`{"endIncluding":"46.0.1"}`
mozilla	firefox	`45.1.0`
mozilla	firefox	`45.1.1`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.