---
id: CVE-2025-0246
title: 'When using an invalid protocol scheme, an attacker could spoof the address bar'
summary: >-
  When using an invalid protocol scheme, an attacker could spoof the address
  bar. 

  *Note: This issue only affected Android operating systems. Other operating
  systems are unaffected.*

  *Note: This issue is a different issue from CVE-2025-024…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
vendor: mozilla
product: firefox
affected:
  - firefox < 134.0
patched:
  - firefox 134.0
published: '2025-01-07'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T19:10:01.007'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-0246'
references:
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1912709'
    label: security@mozilla.org
  - url: 'https://www.mozilla.org/security/advisories/mfsa2025-01/'
    label: security@mozilla.org
tags:
  - nvd
epss: 0.00438
epssPercentile: 0.35706
ingestedAt: '2026-09-30T19:21:07.220Z'
---

## Overview

When using an invalid protocol scheme, an attacker could spoof the address bar. 
*Note: This issue only affected Android operating systems. Other operating systems are unaffected.*
*Note: This issue is a different issue from CVE-2025-0244. This vulnerability was fixed in Firefox 134.

## Affected

- `firefox < 134.0`

## Remediation

Upgrade past the affected range:

- `firefox 134.0`