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CVE-2025-6430

Good to know:

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Date: June 24, 2025

When a file download is specified via the "Content-Disposition" header, that directive would be ignored if the file was included via a "&lt;embed&gt;" or "&lt;object&gt;" tag, potentially making a website vulnerable to a cross-site scripting attack. This vulnerability affects Firefox < 140 and Firefox ESR < 128.12.

Severity Score

Related Resources (7)

https://nvd.nist.gov/vuln/detail/CVE-2025-6430
https://www.mozilla.org/security/advisories/mfsa2025-55/
https://www.mozilla.org/security/advisories/mfsa2025-54/
https://www.mozilla.org/security/advisories/mfsa2025-51/
https://www.mozilla.org/security/advisories/mfsa2025-53/
https://bugzilla.mozilla.org/show_bug.cgi?id=1971140
https://www.mend.io/vulnerability-database/CVE-2025-6430

Severity Score

Weakness Type (CWE)

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CWE-79

Top Fix

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Upgrade Version

Upgrade to version https://github.com/mozilla/gecko-dev.git - null

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): CHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE

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