CVE-2025-8038

CRITICAL

Mozilla Firefox < 140.1.0 - Data Authenticity Bypass

Title source: rule

Description

Thunderbird ignored paths when checking the validity of navigations in a frame. This vulnerability was fixed in Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1.

References (5)

[Permissions Required] https://bugzilla.mozilla.org/show_bug.cgi?id=1808979

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2025-56/

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2025-59/

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2025-61/

[Vendor Advisory] https://www.mozilla.org/security/advisories/mfsa2025-63/

Scores

CVSS v3 9.8

EPSS 0.0006

EPSS Percentile 18.4%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact total

Details

CWE

CWE-345

Status published

Products (8)

mozilla/firefox < 140.1.0

mozilla/firefox < 141.0

Mozilla/Firefox 140.1 - 140.*

Mozilla/Firefox 141

mozilla/thunderbird < 140.1.0

mozilla/thunderbird < 141.0

Mozilla/Thunderbird 140.1 - 140.*

Mozilla/Thunderbird 141

Published Jul 22, 2025

Tracked Since Feb 18, 2026