CVE Daily

CVE-2025-6430

When a file download is specified via the `Content-Disposition` header, that dir...

Medium CVSS 6.1

Overview

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.

CWE: CWE-79 Published: 2025-06-24T13:15:23.993
Risk analysis

This vulnerability is rated 🟡 MEDIUM.

  • CVSS: 6.1 (MEDIUM)
  • Detected tags: xss (tag impact: MODERATE)

Recommended actions:

  • Apply context-aware output encoding.
  • Enable Content-Security-Policy and HttpOnly/SameSite cookies.

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