vulnerability
MFSA2025-27 Thunderbird: Security Vulnerabilities fixed in Thunderbird ESR 128.9.2 (CVE-2025-3523)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 7 | (AV:N/AC:H/Au:N/C:P/I:C/A:P) | Apr 15, 2025 | Apr 16, 2025 | Dec 5, 2025 |
Severity
7
CVSS
(AV:N/AC:H/Au:N/C:P/I:C/A:P)
Published
Apr 15, 2025
Added
Apr 16, 2025
Modified
Dec 5, 2025
Description
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. This vulnerability affects Thunderbird < 137.0.2 and Thunderbird < 128.9.2.
Solution
mozilla-thunderbird-upgrade-128_9_2
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