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

SUSE Affected 4 releases

Version	Status	Fixed in
42.1	Affected	—
13.2	Affected	—
13.1	Affected	—
—	Affected	—

Ubuntu Affected 4 releases

Version	Status	Fixed in
16.04	Affected	—
15.10	Affected	—
14.04	Affected	—
12.04	Affected	—

Debian Mixed 6 releases

Version	Status	Fixed in
trixie	Fixed	`45.2.0esr-1`
sid	Fixed	`47.0-1`
forky	Fixed	`45.2.0esr-1`
bullseye	Fixed	`45.2.0esr-1`
bookworm	Fixed	`45.2.0esr-1`
8.0	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.