CVEvulnerability
CVE-2021-43540
6.5 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2021-12-08
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
- CVSS 2.0 ([email protected])
- 4.3 MEDIUM — AV:N/AC:M/Au:N/C:N/I:P/A:N
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.
Affected configurations
• mozilla firefox (< 95.0)
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1636629 Issue Tracking, Permissions Required, Vendor Advisory
- https://security.gentoo.org/glsa/202202-03 Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-52/ Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1636629 Issue Tracking, Permissions Required, Vendor Advisory
- https://security.gentoo.org/glsa/202202-03 Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2021-52/ Vendor Advisory