---
id: CVE-2025-5264
title: >-
  Due to insufficient escaping of the newline character in the “Copy as cURL”
  feature, an attacker could trick a user into using this command, potentially
  leading to local code execution on the user's system
summary: >-
  Due to insufficient escaping of the newline character in the “Copy as cURL”
  feature, an attacker could trick a user into using this command, potentially
  leading to local code execution on the user's system. This vulnerability was
  fixed i…
severity: medium
cvss: 4.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L'
cwe:
  - CWE-77
vendor: mozilla
product: firefox
affected:
  - firefox < 115.24.0
  - firefox < 139.0
  - 'firefox >= 116.0, < 128.11.0'
patched:
  - firefox 128.11.0
published: '2025-05-27'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T18:10:00.190'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-5264'
references:
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=1950001'
    label: security@mozilla.org
  - url: 'https://www.mozilla.org/security/advisories/mfsa2025-42/'
    label: security@mozilla.org
  - url: 'https://www.mozilla.org/security/advisories/mfsa2025-43/'
    label: security@mozilla.org
  - url: 'https://www.mozilla.org/security/advisories/mfsa2025-44/'
    label: security@mozilla.org
  - url: 'https://www.mozilla.org/security/advisories/mfsa2025-45/'
    label: security@mozilla.org
  - url: 'https://www.mozilla.org/security/advisories/mfsa2025-46/'
    label: security@mozilla.org
  - url: 'https://lists.debian.org/debian-lts-announce/2025/05/msg00043.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2025/05/msg00046.html'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00294
epssPercentile: 0.19824
ingestedAt: '2026-09-30T18:17:24.438Z'
---

## Overview

Due to insufficient escaping of the newline character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.

## Affected

- `firefox < 115.24.0`
- `firefox < 139.0`
- `firefox >= 116.0, < 128.11.0`

## Remediation

Upgrade past the affected range:

- `firefox 128.11.0`