Security Advisory

CVE-2025-3523

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2025-04-15 15:06:14

Last updated 2026-04-13 14:28:31

Assigner mozilla

State PUBLISHED

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 was fixed in Thunderbird 137.0.2 and Thunderbird 128.9.2.

← Browse all CVEs View on cve.org ↗