CVE-2023-25743

Mozilla: Fullscreen notification not shown in Firefox Focus

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Severity

Important

Red Hat Product Security

7.5

CVSS 3.1

Review impact separately from score.

Published · February 14, 2023

Updated · November 22, 2025

Description

The Mozilla Foundation Security Advisory describes this flaw as:

A lack of in app notification for entering fullscreen mode could have lead to a malicious website spoofing browser chrome.

This bug only affects Firefox Focus. Other versions of Firefox are unaffected.

Statement

Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7.5
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE-357 · Insufficient UI Warning of Dangerous Operations