CVE-2020-6810

MEDIUM

Firefox < 74.0 - Authentication Bypass by Spoofing via Fullscreen Mode Popup

Title source: llm
STIX 2.1

Description

After a website had entered fullscreen mode, it could have used a previously opened popup to obscure the notification that indicates the browser is in fullscreen mode. Combined with spoofing the browser chrome, this could have led to confusing the user about the current origin of the page and credential theft or other attacks. This vulnerability affects Firefox < 74.

References (2)

Core 2
Core References
Issue Tracking, Vendor Advisory x_refsource_misc
https://bugzilla.mozilla.org/show_bug.cgi?id=1432856

Scores

CVSS v3 4.3
EPSS 0.0026
EPSS Percentile 49.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Details

CWE
CWE-290
Status published
Products (1)
mozilla/firefox < 74.0
Published Mar 25, 2020
Tracked Since Feb 18, 2026