Bug 2366287 (CVE-2025-3875) - CVE-2025-3875 thunderbird: Sender Spoofing via Malformed From Header in Thunderbird
Summary: CVE-2025-3875 thunderbird: Sender Spoofing via Malformed From Header in Thund...
Keywords:
Status: NEW
Alias: CVE-2025-3875
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-05-14 18:01 UTC by OSIDB Bzimport
Modified: 2025-05-16 12:35 UTC (History)
5 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2025-05-14 18:01:44 UTC 
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 as the actual address. This vulnerability affects Thunderbird < 128.10.1 and Thunderbird < 138.0.1.
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