CVE-2025-5265

What it is

Due to insufficient escaping of the ampersand 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 bug only affects Firefox for Windows. Other versions of Firefox are unaffected.*. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.

At a glance

Exploitability

Can be exploited locally on the machine with a low-privilege account, but needs a user to act. Limited direct impact.

Exploit odds

0.2% chance of exploitation in the next 30 days (EPSS).

Fix

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

Timeline

1. 2025-05-27 13:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-10-05 15:10 UTC Last updatedMost recent change to the record

Details

Published

2025-05-27 13:15 UTC

Last modified

2026-10-05 15:10 UTC

Exploit probability

0.2% · EPSS, next 30 days

Weakness

CWE-77 · Command injection

Record status

Modified

Affected

• Mozilla Firefox < 115.24.0
• Mozilla Firefox < 139.0
• Mozilla Firefox < 128.11.0

Attack profile CVSS 3.1 · 4.8

Attack vector

Local

Complexity

Low

Privileges needed

Low

User interaction

Required

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low