CVE-2025-0237

MEDIUM

Firefox <134, Thunderbird <128.6 - Privilege Escalation

Title source: llm

Description

The WebChannel API, which is used to transport various information across processes, did not check the sending principal but rather accepted the principal being sent. This could have led to privilege escalation attacks. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.

References (6)

Core 6

Core References

Mailing List

https://lists.debian.org/debian-lts-announce/2025/01/msg00004.html

Issue Tracking, Permissions Required

https://bugzilla.mozilla.org/show_bug.cgi?id=1915257

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2025-01/

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2025-02/

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2025-04/

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2025-05/

Scores

CVSS v3 5.4

EPSS 0.0012

EPSS Percentile 30.3%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-863

Status published

Products (7)

mozilla/firefox < 128.6.0

mozilla/firefox < 134.0

Mozilla/Firefox 128.6 - 128.*

Mozilla/Firefox 134

mozilla/thunderbird < 128.6.0

Mozilla/Thunderbird 128.6 - 128.*

Mozilla/Thunderbird 134

Published Jan 07, 2025

Tracked Since Feb 18, 2026