MDaemon Mail Server 23.5.2 validates SPF, DKIM, and DMARC using the email enclosed in angle brackets (<>) in the From: header of SMTP DATA. An attacker can craft a From: header with multiple invisible Unicode thin spaces to display a spoofed sender while passing validation, allowing email spoofing even when anti-spoofing protections are in place. NOTE: this is disputed by the Supplier because UI spoofing occurs in a client, not in a server such as MDaemon's product or any other server implementation. Also, if a client without its own spoofing protection must be used, the Header Screening feature in MDaemon's product can be employed to mitigate the client-side vulnerability.
Metrics
Affected Vendors & Products
References
History
Thu, 13 Nov 2025 14:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | MDaemon Mail Server 23.5.2 validates SPF, DKIM, and DMARC using the email enclosed in angle brackets (<>) in the From: header of SMTP DATA. An attacker can craft a From: header with multiple invisible Unicode thin spaces to display a spoofed sender while passing validation, allowing email spoofing even when anti-spoofing protections are in place. | MDaemon Mail Server 23.5.2 validates SPF, DKIM, and DMARC using the email enclosed in angle brackets (<>) in the From: header of SMTP DATA. An attacker can craft a From: header with multiple invisible Unicode thin spaces to display a spoofed sender while passing validation, allowing email spoofing even when anti-spoofing protections are in place. NOTE: this is disputed by the Supplier because UI spoofing occurs in a client, not in a server such as MDaemon's product or any other server implementation. Also, if a client without its own spoofing protection must be used, the Header Screening feature in MDaemon's product can be employed to mitigate the client-side vulnerability. |
Thu, 06 Nov 2025 10:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mdaemon
Mdaemon email Server |
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| Vendors & Products |
Mdaemon
Mdaemon email Server |
Wed, 05 Nov 2025 16:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-116 CWE-20 |
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| Metrics |
cvssV3_1
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Wed, 05 Nov 2025 15:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | MDaemon Mail Server 23.5.2 validates SPF, DKIM, and DMARC using the email enclosed in angle brackets (<>) in the From: header of SMTP DATA. An attacker can craft a From: header with multiple invisible Unicode thin spaces to display a spoofed sender while passing validation, allowing email spoofing even when anti-spoofing protections are in place. | |
| References |
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Status: PUBLISHED
Assigner: mitre
Published: 2025-11-05T00:00:00.000Z
Updated: 2025-11-13T13:57:52.736Z
Reserved: 2025-09-26T00:00:00.000Z
Link: CVE-2025-61084
Updated: 2025-11-05T15:11:11.097Z
Status : Awaiting Analysis
Published: 2025-11-05T15:15:39.997
Modified: 2025-11-13T14:15:49.040
Link: CVE-2025-61084
No data.