VULNERABILITY INTELLIGENCE

CVE-2025-6435

CVSS score8.1 HIGH
EPSS probability0.46%
CISA KEVNot currently listed
Published2025-06-24
Last modified2026-09-30
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

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 `.download` file extension. This could have led to the user inadvertently running a malicious executable. This vulnerability was fixed in Firefox 140 and Thunderbird 140.

Weakness classification

  • CWE-434: Unrestricted Upload of File with Dangerous Type

Primary references