cve-2025-3522
Vulnerability from cvelistv5
Published
2025-04-15 15:06
Modified
2025-04-15 19:05
Summary
Thunderbird processes the X-Mozilla-External-Attachment-URL header to handle attachments which can be hosted externally. When an email is opened, Thunderbird accesses the specified URL to determine file size, and navigates to it when the user clicks the attachment. Because the URL is not validated or sanitized, it can reference internal resources like chrome:// or SMB share file:// links, potentially leading to hashed Windows credential leakage and opening the door to more serious security issues. This vulnerability affects Thunderbird < 137.0.2 and Thunderbird < 128.9.2.
Impacted products
Show details on NVD website


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                "description": "CWE-601 URL Redirection to Untrusted Site (\u0027Open Redirect\u0027)",
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    "dateReserved": "2025-04-11T15:23:30.875Z",
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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
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  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.