CVE-2025-3875

Sender Spoofing via Malformed From Header in Thunderbird

CVSS 7.5 HIGHEPSS 0.3%CWE-290

Thunderbird parses addresses in a way that can allow sender spoofing in case the server allows an invalid From address to be used. For example, if the From header contains an (invalid) value "Spoofed Name ", Thunderbird treats spoofed@example.com as the actual address. This vulnerability was fixed in Thunderbird 128.10.1 and Thunderbird 138.0.1.

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

Produtos afetados

Mozilla · Thunderbird

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Referências

https://bugzilla.mozilla.org/show_bug.cgi?id=1950629 https://lists.debian.org/debian-lts-announce/2025/05/msg00022.html https://www.mozilla.org/security/advisories/mfsa2025-34/https://www.mozilla.org/security/advisories/mfsa2025-35/