CVE-2025-3875
Sender Spoofing via Malformed From Header in Thunderbird
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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 [email protected] as the actual address. This vulnerability was fixed in Thunderbird 128.10.1 and Thunderbird 138.0.1.
| Vendor | mozilla |
| Product | thunderbird |
| Ecosystems | |
| Industries | Technology |
| Published | May 14, 2025 |
| Last Updated | Apr 13, 2026 |
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Affected Versions
Mozilla / Thunderbird
All versions affected References
Credits
xh4vm