EUVD-2025-10966

Malicious code in bioql PyPI...

Mozilla Thunderbird < 137.0.2

The version of Thunderbird installed on the remote Windows host is prior to 137.0.2. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-26 advisory. - When an email contains multiple attachments with external links via the X-Mozilla-External-Attachment-URL header...

Mozilla Thunderbird < 137.0.2

The version of Thunderbird installed on the remote macOS or Mac OS X host is prior to 137.0.2. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-26 advisory. - When an email contains multiple attachments with external links via the...

CVE-2025-3523

When an email contains multiple attachments with external links via the X-Mozilla-External-Attachment-URL header, only the last link is shown when hovering over any attachment. Although the correct link is used on click, the misleading hover text could trick users into downloading content from...

CVE-2025-3523

Vulnerability in Thunderbird where the X-Mozilla-External-Attachment-URL header is processed such that only the last external link is shown on hover for multi-attachment messages. The hover text can mislead users into downloading content from untrusted sources, while the correct link is used on c...

Security Vulnerabilities fixed in Thunderbird 137.0.2 — Mozilla

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 validate...