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Vulnerability details: VCID-k5wa-f3av-63gr
Vulnerability ID VCID-k5wa-f3av-63gr
Aliases CVE-2020-12394
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-451 User Interface (UI) Misrepresentation of Critical Information
System Score Found at
cvssv3 2.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-12394.json
epss 0.00139 https://api.first.org/data/v1/epss?cve=CVE-2020-12394
epss 0.00139 https://api.first.org/data/v1/epss?cve=CVE-2020-12394
epss 0.00139 https://api.first.org/data/v1/epss?cve=CVE-2020-12394
epss 0.00139 https://api.first.org/data/v1/epss?cve=CVE-2020-12394
epss 0.00139 https://api.first.org/data/v1/epss?cve=CVE-2020-12394
epss 0.00139 https://api.first.org/data/v1/epss?cve=CVE-2020-12394
epss 0.00139 https://api.first.org/data/v1/epss?cve=CVE-2020-12394
epss 0.00139 https://api.first.org/data/v1/epss?cve=CVE-2020-12394
epss 0.00139 https://api.first.org/data/v1/epss?cve=CVE-2020-12394
epss 0.00139 https://api.first.org/data/v1/epss?cve=CVE-2020-12394
epss 0.00139 https://api.first.org/data/v1/epss?cve=CVE-2020-12394
epss 0.00139 https://api.first.org/data/v1/epss?cve=CVE-2020-12394
epss 0.00139 https://api.first.org/data/v1/epss?cve=CVE-2020-12394
epss 0.00139 https://api.first.org/data/v1/epss?cve=CVE-2020-12394
epss 0.00139 https://api.first.org/data/v1/epss?cve=CVE-2020-12394
epss 0.00139 https://api.first.org/data/v1/epss?cve=CVE-2020-12394
cvssv2 2.1 https://nvd.nist.gov/vuln/detail/CVE-2020-12394
cvssv3.1 3.3 https://nvd.nist.gov/vuln/detail/CVE-2020-12394
archlinux Critical https://security.archlinux.org/AVG-1148
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2020-16
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-12394.json
https://api.first.org/data/v1/epss?cve=CVE-2020-12394
https://bugzilla.mozilla.org/show_bug.cgi?id=1628288
https://security.gentoo.org/glsa/202005-04
https://www.mozilla.org/security/advisories/mfsa2020-16/
1834688 https://bugzilla.redhat.com/show_bug.cgi?id=1834688
ASA-202005-3 https://security.archlinux.org/ASA-202005-3
AVG-1148 https://security.archlinux.org/AVG-1148
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
CVE-2020-12394 https://nvd.nist.gov/vuln/detail/CVE-2020-12394
mfsa2020-16 https://www.mozilla.org/en-US/security/advisories/mfsa2020-16
USN-4353-1 https://usn.ubuntu.com/4353-1/
No exploits are available.
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2020-12394.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:L/AC:L/Au:N/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-12394
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2020-12394
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.3474
EPSS Score 0.00139
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:39.957466+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2020/mfsa2020-16.yml 37.0.0