CVE-2025-6435

firefox: Save as in Devtools could download files without sanitizing the extension

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Severity

Low

Red Hat Product Security

3.4

CVSS 3.1

Review impact separately from score.

Published · June 24, 2025

Updated · June 30, 2026

Description

A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: If a user saved a response from the Network tab in Devtools using the Save As context menu option, that file may not have been saved with the <code>.download</code> file extension. This could have led to the user inadvertently running a malicious executable.

Statement

Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 3.4
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

CWE not specified