CVE-2025-4087 Affecting firefox package, versions <138.0-1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

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  • Snyk IDSNYK-DEBIANUNSTABLE-FIREFOX-9910178
  • published1 May 2025
  • disclosed29 Apr 2025

Introduced: 29 Apr 2025

NewCVE-2025-4087  (opens in a new tab)

How to fix?

Upgrade Debian:unstable firefox to version 138.0-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

A vulnerability was identified in Thunderbird where XPath parsing could trigger undefined behavior due to missing null checks during attribute access. This could lead to out-of-bounds read access and potentially, memory corruption. This vulnerability affects Firefox < 138, Firefox ESR < 128.10, Thunderbird < 138, and Thunderbird < 128.10.

CVSS Base Scores

version 3.1