CVE-2025-1011

HIGH

Firefox < 135.0 and Thunderbird < 135.0 - Remote Code Execution via WebAssembly Code Generation

Title source: llm

Description

A bug in WebAssembly code generation could have lead to a crash. It may have been possible for an attacker to leverage this to achieve code execution. This vulnerability was fixed in Firefox 135, Firefox ESR 128.7, Thunderbird 128.7, and Thunderbird 135.

References (7)

Core 7

Core References

Mailing List

https://lists.debian.org/debian-lts-announce/2025/02/msg00005.html

Mailing List

https://lists.debian.org/debian-lts-announce/2025/02/msg00006.html

Permissions Required

https://bugzilla.mozilla.org/show_bug.cgi?id=1936454

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2025-07/

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2025-09/

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2025-10/

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2025-11/

Scores

CVSS v3 8.8

EPSS 0.0021

EPSS Percentile 43.8%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact total

Details

CWE

CWE-94

Status published

Products (8)

mozilla/firefox < 128.7.0

mozilla/firefox < 135.0

Mozilla/Firefox 128.7 - 128.*

Mozilla/Firefox 135

mozilla/thunderbird < 135.0

mozilla/thunderbird 128.0.1 - 128.7.0

Mozilla/Thunderbird 128.7 - 128.*

Mozilla/Thunderbird 135

Published Feb 04, 2025

Tracked Since Feb 18, 2026