CVE-2025-3523 (GCVE-0-2025-3523)
Vulnerability from cvelistv5
Published
2025-04-15 15:06
Modified
2026-04-13 14:28
Severity ?
6.4 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L
Summary
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 was fixed in Thunderbird 137.0.2 and Thunderbird 128.9.2.
References
Impacted products
Vendor Product Version
Mozilla Thunderbird Unaffected: 128.9.2
Unaffected: 137.0.2
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