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Vulnerability record · CVE-2020-12394 · published 26 May 2020

CVE-2020-12394: Mozilla firefox vulnerability

Mozilla · Firefox

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.

3.3 CVSS 3.1 Low EPSS 0.27% · top 82.2%
3.3CVSS 3.1 base score, v2 2.1
0.27%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://bugzilla.mozilla.org/show_bug.cgi?id=1628288 Issue TrackingPermissions Required
https://security.gentoo.org/glsa/202005-04 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2020-16/ Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1628288 Issue TrackingPermissions Required
https://security.gentoo.org/glsa/202005-04 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2020-16/ Vendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-12394), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.