CVE-2025-4084

Name: CVE-2025-4084
Creator: NVD / NIST
Published: 2025-04-29T14:15:35.097+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.7/10EPSS 0.33%

Last modified Jun 17, 2026

CVE-2025-4084 is a medium-severity vulnerability rated 5.7/10 on the CVSS scale. 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.*. EPSS estimates a 0.33% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

5.7/10

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

EPSS Probability

0.33%

25.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-116

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 115.23
Mozilla	Firefox	>= 128.0, < 128.10
Mozilla	Thunderbird	< 128.10.0

References

https://bugzilla.mozilla.org/buglist.cgi?bug_id=1949994%2C1956698%2C1960198Broken Link
https://www.mozilla.org/security/advisories/mfsa2025-29/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-30/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-32/Vendor Advisory
https://lists.debian.org/debian-lts-announce/2025/05/msg00022.html

Timeline

Published: Apr 29, 2025
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2025-4084?

How severe is CVE-2025-4084?

CVE-2025-4084 has a CVSS score of 5.7/10 (MEDIUM severity). The EPSS model estimates a 0.33% probability of exploitation in the next 30 days.

How do I fix CVE-2025-4084?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-4084?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST