CVE-2025-6430
6.1
MEDIUM
CVSS 3.1
EPSS 0.37%
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.
How to fix CVE-2025-6430
To remediate CVE-2025-6430, upgrade the affected package to a fixed version below.
- —upgrade to 128.12.0esr-1~deb11u1 or later
- —upgrade to 1:128.12.0esr-1~deb11u1 or later
Is CVE-2025-6430 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 128.12.0esr-1~deb11u1
- from 0, < 1:128.12.0esr-1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |