CVE-2025-6430 — Content-Disposition header ignored when a file is included in an embed or object tag
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, p…
Published: 2025-06-24 · CVSS: 6.1 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7