CVE-2020-6823

CRITICAL

Firefox < 75.0 - Unauthenticated Authorization Bypass via WebAuthFlow Redirect

Title source: llm
STIX 2.1

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.

References (2)

Core 2
Core References
Third Party Advisory x_refsource_misc
https://www.mozilla.org/security/advisories/mfsa2020-12/
Issue Tracking, Vendor Advisory x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1614919

Scores

CVSS v3 9.8
EPSS 0.0092
EPSS Percentile 76.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-862
Status published
Products (1)
mozilla/firefox < 75.0
Published Apr 24, 2020
Tracked Since Feb 18, 2026