CVE-2019-17016

critical

Published 2020-01-14 · Modified 2020-01-16

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

9.5

Description

When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in data exfiltration. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.

Predictions

Exploit likelihood

20%

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

Arch Fixed 1 release

Version	Status	Fixed in
—	Fixed	`68.4.1-1`

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`68.4.0esr-1`
sid	Fixed	`72.0-1`
forky	Fixed	`68.4.0esr-1`
bullseye	Fixed	`68.4.0esr-1`
bookworm	Fixed	`68.4.0esr-1`

Red Hat Fixed 1 release

Version	Status	Fixed in
8	Fixed	—

References

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

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