The version of Thunderbird installed on the remote macOS or Mac OS X host is prior to 128.9.2. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-27 advisory.

  - 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 untrusted sources.
    (CVE-2025-3523)

  - 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.
    (CVE-2025-3522)

  - By crafting a malformed file name for an attachment in a multipart message, an attacker can trick     Thunderbird into including a directory listing of /tmp when the message is forwarded or edited as a new     message. This vulnerability could allow attackers to disclose sensitive information from the victim's     system. This vulnerability is not limited to Linux; similar behavior has been observed on Windows as well.
    (CVE-2025-2830)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

Mozilla Thunderbird < 128.9.2

medium Nessus Plugin ID 234457

Version 1.2

Version 1.1

Version 1.2 Apr 17, 2025, 11:50 PM IAVM reference STIG Severity (set to "I") Plugin Feed: 202504172350
Version 1.1 Apr 16, 2025, 8:33 AM New Plugin Feed: 202504160833