CVE-2021-43540

medium

Description

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.

References

https://www.mozilla.org/security/advisories/mfsa2021-52/

https://security.gentoo.org/glsa/202202-03

https://bugzilla.mozilla.org/show_bug.cgi?id=1636629

Details

Source: Mitre, NVD

Published: 2021-12-08

Updated: 2022-07-12

Risk Information

CVSS v2

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N