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CVE-2025-6430

Content-Disposition header ignored when a file is included in an embed or object tag PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
Mozilla / Firefoxunaffected 128.12 through 128.*; unaffected 140 through *
Mozilla / Thunderbirdunaffected 128.12 through 128.*; unaffected 140 through *

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

CVE

No English description supplied.