Email Spoofing Vulnerability in MDaemon Mail Server
CVE-2025-61084

7.1HIGH

Key Information:

Vendor

Alt-N Technologies

Status
MDaemon Mail Server
Vendor
CVE Published:
5 November 2025

What is CVE-2025-61084?

MDaemon Mail Server version 23.5.2 contains a vulnerability whereby it fails to properly validate SPF, DKIM, and DMARC records due to an incorrect interpretation of the From: header in SMTP DATA. Attackers can exploit this weakness by creating a From: header embedded with multiple invisible Unicode thin spaces. This manipulation allows malicious actors to spoof email senders effectively while evading existing anti-spoofing measures. As a result, organizations relying on MDaemon Mail Server for email communication face increased risks of phishing attacks and identity deception.

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References

https://github.com/x00nullbit/CVE-References/blob/main/CV...

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
Low
Integrity:
High
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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