CVE-2025-14327 — Authentication Bypass by Spoofing in Mozilla Firefox

CWE-290 — Authentication Bypass by Spoofing12 documents9 sources
Severity
7.5HIGHNVD
EPSS
0.0%
top 96.61%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla ThunderbirdMozilla Firefox
Timeline
PublishedDec 9
Latest updateFeb 2

Description

Spoofing issue in the Downloads Panel component. This vulnerability was fixed in Firefox 146, Thunderbird 146, Firefox ESR 140.7, and Thunderbird 140.7.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NExploitability: 3.9 | Impact: 3.6

Affected Packages3 packages

▶NVDmozilla/firefox< 146.0
▶NVDmozilla/thunderbird< 146.0
▶Debianmozilla/thunderbird< 1:140.7.0esr-1~deb11u1+3

🔴Vulnerability Details

3
CVEList
Spoofing issue in the Downloads Panel component↗2025-12-09
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OSV
CVE-2025-14327: Spoofing issue in the Downloads Panel component↗2025-12-09
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GHSA
GHSA-wqgj-c38v-hpmm: Spoofing issue in the Downloads Panel component↗2025-12-09
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📋Vendor Advisories

7
Ubuntu
Thunderbird vulnerabilities↗2026-02-02
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Red Hat
firefox: Spoofing issue in the Downloads Panel component↗2025-12-09
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Debian
CVE-2025-14327: firefox - Spoofing issue in the Downloads Panel component. This vulnerability affects Fire...↗2025
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Mozilla
Mozilla Foundation Security Advisory 2026-03: CVE-2025-14327↗
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Mozilla
Mozilla Foundation Security Advisory 2026-05: CVE-2025-14327↗
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🕵️Threat Intelligence

1
Wiz
CVE-2025-14327 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2025-14327 — Authentication Bypass by Spoofing | cvebase