CVE-2025-6430

MEDIUM EPSS 11.9%
Published Jun 24, 20251y ago · Modified Jun 17, 20262w ago
6.1 CVSS 3.1
Medium
Find Similar
Published Jun 24, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
6.1
Exploitability
2.8
Impact
2.7
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Changed
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
11.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-79 Cross-site Scripting Injection

Affected Products 2

VendorProductVersionRange
mozillafirefox* <128.12.0
mozillafirefox* <140.0

References 7

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=1971140
    Permissions Required
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/06/msg00029.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/07/msg00002.html
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-51/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-53/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-54/
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2025-55/

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.