CVE-2025-4084

What it is

Due to insufficient escaping of the special characters 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 bug only affects Firefox for Windows. Other versions of Firefox are unaffected.*. This vulnerability was fixed in Firefox ESR 128.10, Firefox ESR 115.23, and Thunderbird 128.10.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account, but needs a user to act. High risk of data exposure.

Exploit odds

0.4% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2025-04-29 14:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-10-05 15:10 UTC Last updatedMost recent change to the record

Details

Published

2025-04-29 14:15 UTC

Last modified

2026-10-05 15:10 UTC

Exploit probability

0.4% · EPSS, next 30 days

Weakness

CWE-116

Record status

Modified

Affected

• Mozilla Firefox < 115.23
• Mozilla Firefox < 128.10
• Mozilla Thunderbird < 128.10.0

Attack profile CVSS 3.1 · 5.7

Attack vector

Network

Complexity

Low

Privileges needed

Low

User interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None