<p>Upgrade <code>Debian:unstable</code> <code>firefox</code> to version 95.0-1 or higher.</p>

CVE-2021-43540 Affecting firefox package, versions <95.0-1

Snyk CVSS

Attack Complexity Low

User Interaction Required

Integrity High

Threat Intelligence

EPSS 0.09% (38^th percentile)

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Snyk ID SNYK-DEBIANUNSTABLE-FIREFOX-2311969
published 8 Dec 2021
disclosed 8 Dec 2021

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Introduced: 8 Dec 2021

CVE-2021-43540 Open this link in a new tab

How to fix?

Upgrade Debian:unstable firefox to version 95.0-1 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.

WebExtensions with the correct permissions were able to create and install ServiceWorkers for third-party websites that would not have been uninstalled with the extension. This vulnerability affects Firefox < 95.