CVE-2025-3523

User Interface (UI) Misrepresentation of attachment URL

CVSS 6.4 MEDIUMEPSS 0.3%CWE-451

Vexday Risk Score

13Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

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

Ciclo de vida

15 abr 2025Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

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

Produtos afetados

Mozilla · Thunderbird

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Referências

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/