CVE-2025-1936 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
0.43% (36th percentile)

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  • Snyk IDSNYK-ECHOLATEST-FIREFOXESR-18168964
  • published22 Jul 2026
  • disclosed4 Mar 2025

Introduced: 4 Mar 2025

CVE-2025-1936  (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.

jar: URLs retrieve local file content packaged in a ZIP archive. The null and everything after it was ignored when retrieving the content from the archive, but the fake extension after the null was used to determine the type of content. This could have been used to hide code in a web extension disguised as something else like an image. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.

CVSS Base Scores

version 3.1