CVE-2025-6430
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, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12.
| Software | From | Fixed in |
|---|---|---|
| mozilla / firefox | - | 140.0 |
| mozilla / firefox | - | 128.12.0 |
- https://bugzilla.mozilla.org/show_bug.cgi?id=1971140
- https://lists.debian.org/debian-lts-announce/2025/06/msg00029.html
- https://lists.debian.org/debian-lts-announce/2025/07/msg00002.html
- https://www.mozilla.org/security/advisories/mfsa2025-51/
- https://www.mozilla.org/security/advisories/mfsa2025-53/
- https://www.mozilla.org/security/advisories/mfsa2025-54/
- https://www.mozilla.org/security/advisories/mfsa2025-55/
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