CVE-2020-12394

critical

Published — · Modified —

CVSS v3

—

CVSS v2

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VIR risk

9.5

Description

A logic flaw in our location bar implementation could have allowed a local attacker to spoof the current location by selecting a different origin and removing focus from the input element. This vulnerability affects Firefox < 76.

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-12394

vendor Authored 2026-05-27

Vendor advisory: arch — https://security.archlinux.org/ASA-202005-3

OS impact

OS	Version	Status	Fixed in
arch		fixed	`76.0-1`
debian	sid	fixed	`76.0-1`

References

https://security.archlinux.org/ASA-202005-3
https://security-tracker.debian.org/tracker/CVE-2020-12394

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