CVE-2020-6823

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

A malicious extension could have called <code>browser.identity.launchWebAuthFlow</code>, controlling the redirect_uri, and through the Promise returned, obtain the Auth code and gain access to the user's account at the service provider. This vulnerability affects Firefox < 75.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-862

Affected software

Vendor	Product	Versions
Mozilla	Firefox	>= unspecified, < 75

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1614919Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-12/Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1614919Issue Tracking, Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-12/Third Party Advisory

Timeline

Published: Apr 24, 2020
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2020

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