CVE-2025-3523

User Interface (UI) Misrepresentation of attachment URL

CVSS 6.4 MEDIUMEPSS 0.3%CWE-451

Vexday Risk Score

13Bajo

Decisión SSVC (CISA)

Track

Sin señal de explotación → monitorear

CVSS 6.4EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

15 abr 2025Publicada en NVD

Recomendación: Monitorear — sin señal de explotación por ahora.

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:L

Productos afectados

Mozilla · Thunderbird

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Referencias

https://bugzilla.mozilla.org/show_bug.cgi?id=1958385 https://www.mozilla.org/security/advisories/mfsa2025-26/https://www.mozilla.org/security/advisories/mfsa2025-27/