Description

When a file download is specified via the `Content-Disposition` header, that directive would be ignored if the file was included via a `<embed>` or `<object>` tag, potentially making a website vulnerable to a cross-site scripting attack. This vulnerability was fixed in Firefox 140, Firefox ESR 128.12, Thunderbird 140, and Thunderbird 128.12.

INFO

Published Date :

2025-06-24T12:28:01.020Z

Last Modified :

2026-04-13T14:30:45.145Z

Source :

mozilla
AFFECTED PRODUCTS

The following products are affected by CVE-2025-6430 vulnerability.

Vendors Products
Mozilla
  • Firefox
  • Firefox Esr
Redhat
  • Enterprise Linux
  • Rhel Aus
  • Rhel E4s
  • Rhel Els
  • Rhel Eus
  • Rhel Tus
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-6430.

URL Resource
https://bugzilla.mozilla.org/show_bug.cgi?id=1971140 cve-icon cve-icon
https://lists.debian.org/debian-lts-announce/2025/06/msg00029.html cve-icon
https://lists.debian.org/debian-lts-announce/2025/07/msg00002.html cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-6430 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-6430 cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-51/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-53/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-53/#CVE-2025-6430 cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-54/ cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2025-55/ cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact