CVE-2021-43540

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.5 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
mozillaCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 57%
VendorProductVersion
mozillafirefox
𝑥
< 95.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
firefox
sid
132.0.1-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
firefox
lunar
Fixed 95.0+build1-0ubuntu1
released
kinetic
Fixed 95.0+build1-0ubuntu1
released
jammy
Fixed 95.0+build1-0ubuntu1
released
impish
Fixed 95.0+build1-0ubuntu0.21.10.1
released
hirsute
Fixed 95.0+build1-0ubuntu0.21.04.1
released
focal
Fixed 95.0+build1-0ubuntu0.20.04.1
released
bionic
Fixed 95.0+build1-0ubuntu0.18.04.1
released
xenial
ignored
trusty
dne
References
https://bugzilla.mozilla.org/show_bug.cgi?id=1636629
https://security.gentoo.org/glsa/202202-03
https://www.mozilla.org/security/advisories/mfsa2021-52/
https://bugzilla.mozilla.org/show_bug.cgi?id=1636629
https://security.gentoo.org/glsa/202202-03
https://www.mozilla.org/security/advisories/mfsa2021-52/