Security Advisory

CVE-2025-3875

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2025-05-14 16:56:42

Last updated 2026-04-13 14:27:50

Assigner mozilla

State PUBLISHED

Description

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.

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