CVE-2025-6430
Unknown
Unknown - Not Provided
BaseFortify
Publication date: 2025-06-24
Last updated on: 2026-04-13
Assigner: Mozilla Corporation
Description
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.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mozilla | firefox | From 60.9.0 (exc) |
| mozilla | firefox | From 60.9.0 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-79 | The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability occurs when a file download specified via the Content-Disposition header is ignored if the file is included using an <embed> or <object> tag. This behavior can make a website vulnerable to a cross-site scripting (XSS) attack.
How can this vulnerability impact me? :
The vulnerability can allow attackers to execute cross-site scripting attacks on affected websites, potentially leading to unauthorized actions, data theft, or session hijacking for users of Firefox versions less than 140 and Firefox ESR less than 128.12.
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