CVE-2025-1935 Affecting firefox-esr package, versions <128.8.0esr-1~deb12u1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.33% (26th percentile)

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  • Snyk IDSNYK-ECHOLATEST-FIREFOXESR-18168963
  • published22 Jul 2026
  • disclosed4 Mar 2025

Introduced: 4 Mar 2025

CVE-2025-1935  (opens in a new tab)

How to fix?

Upgrade Echo:latest firefox-esr to version 128.8.0esr-1~deb12u1 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 Echo. See How to fix? for Echo:latest relevant fixed versions and status.

A web page could trick a user into setting that site as the default handler for a custom URL protocol. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

CVSS Base Scores

version 3.1