---
id: CVE-2023-29534
title: >-
  Different techniques existed to obscure the fullscreen notification in Firefox
  and Focus for Android
summary: >-
  Different techniques existed to obscure the fullscreen notification in Firefox
  and Focus for Android.  These could have led to potential user confusion and
  spoofing attacks.


  *This bug only affects Firefox and Focus for Android. Other ve…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'
vendor: mozilla
product: firefox_focus
affected:
  - firefox_focus < 112.0
  - firefox_mobile < 112.0
patched:
  - firefox_focus 112.0
  - firefox_mobile 112.0
published: '2023-06-19'
updated: '2026-08-19'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-29534'
references:
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1816007'
    label: security@mozilla.org
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1816059'
    label: security@mozilla.org
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1821155'
    label: security@mozilla.org
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1821576'
    label: security@mozilla.org
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1821906'
    label: security@mozilla.org
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1822298'
    label: security@mozilla.org
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1822305'
    label: security@mozilla.org
  - url: 'https://www.mozilla.org/security/advisories/mfsa2023-13/'
    label: security@mozilla.org
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1816007'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1816059'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1821155'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1821576'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1821906'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1822298'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1822305'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.mozilla.org/security/advisories/mfsa2023-13/'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00706
epssPercentile: 0.51297
ingestedAt: '2026-08-19T15:41:15.947Z'
---

## Overview

Different techniques existed to obscure the fullscreen notification in Firefox and Focus for Android.  These could have led to potential user confusion and spoofing attacks.

*This bug only affects Firefox and Focus for Android. Other versions of Firefox are unaffected.* This vulnerability affects Firefox for Android < 112 and Focus for Android < 112.



## Affected

- `firefox_focus < 112.0`
- `firefox_mobile < 112.0`

## Remediation

Upgrade past the affected range:

- `firefox_focus 112.0`
- `firefox_mobile 112.0`