CVE-2025-6435

June 24, 2025, 2:15 p.m.

8.1
High

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 affects Firefox < 140.

Product(s) Impacted

Vendor Product Versions
Mozilla
  • Firefox
  • <140

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-434
Unrestricted Upload of File with Dangerous Type
The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a mozilla firefox <140 / / / / / / /

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1950056
https://bugzilla.mozilla.org/show_bug.cgi?id=1961777
https://www.mozilla.org/security/advisories/mfsa2025-51/

Tags

CWE-434
security@mozilla.org
2025-06-24
CVE-2025-6435

CVSS Score

8.1 / 10

CVSS Data - 3.1

  • Attack Vector: NETWORK
  • Attack Complexity: HIGH
  • Privileges Required: NONE
  • Scope: UNCHANGED
  • Confidentiality Impact: HIGH
  • Integrity Impact: HIGH
  • Availability Impact: HIGH

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

    View Vector String

Timeline

Published: June 24, 2025, 1:15 p.m.
Last Modified: June 24, 2025, 2:15 p.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

security@mozilla.org

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.