CVE - CVE-2025-3523

CVE-ID
CVE-2025-3523	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://bugzilla.mozilla.org/show_bug.cgi?id=1958385 URL:https://bugzilla.mozilla.org/show_bug.cgi?id=1958385 MISC:https://www.mozilla.org/security/advisories/mfsa2025-26/ URL:https://www.mozilla.org/security/advisories/mfsa2025-26/ MISC:https://www.mozilla.org/security/advisories/mfsa2025-27/ URL:https://www.mozilla.org/security/advisories/mfsa2025-27/
Assigning CNA
Mozilla Corporation
Date Record Created
20250411	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250411)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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