Sender spoofing via invalid From group syntax
Published Feb 4, 2025 · Updated Apr 13, 2026
Sender spoofing in Mozilla Thunderbird before 128.7 and before 135 allows remote attackers to display a false sender address in crafted email. When parsing the From header, Thunderbird accepts an invalid group-name form and renders an address different from the sender address encoded by the message. A recipient must view the malicious message; the result is misleading sender identity in the mail interface, not mailbox access or code execution.
Summary
What happened
Sender spoofing in Mozilla Thunderbird before 128.7 and before 135 allows remote attackers to display a false sender address in crafted email. When parsing the From header, Thunderbird accepts an invalid group-name form and renders an address different from the sender address encoded by the message. A recipient must view the malicious message; the result is misleading sender identity in the mail interface, not mailbox access or code execution.
The record
- CVE
- CVE-2025-0510
- Published
- Feb 4, 2025
- Updated
- Apr 13, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-345, T1566
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 4, 2025CVE publishedPublication date reported by the CVE source.
- Apr 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
Affected products and versions are unavailable in this record.
Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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