CVE-2025-0237 Affecting firefox-esr package, versions <128.6.0esr-1~deb11u3


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-DEBIAN11-FIREFOXESR-8602887
  • published8 Jan 2025
  • disclosed7 Jan 2025

Introduced: 7 Jan 2025

NewCVE-2025-0237  (opens in a new tab)

How to fix?

Upgrade Debian:11 firefox-esr to version 128.6.0esr-1~deb11u3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox-esr package and not the firefox-esr package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

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 affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird < 128.6.

CVSS Scores

version 3.1