PT-2025-45105 · Alt N Technologies · Mdaemon Email Server

CVE-2025-61084 · Published 2025-11-05 · Updated 2025-11-05

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

Name of the Vulnerable Software and Affected Versions MDaemon Mail Server version 23.5.2

Description MDaemon Mail Server version 23.5.2 validates Sender Policy Framework (SPF), DomainKeys Identified Mail (DKIM), and Domain-based Message Authentication, Reporting & Conformance (DMARC) using the email address enclosed in angle brackets (<>) within the From: header of Simple Mail Transfer Protocol (SMTP) DATA. An attacker can exploit this by crafting a From: header containing multiple invisible Unicode thin spaces, which allows for email spoofing even when anti-spoofing protections are enabled. The vulnerability allows displaying a spoofed sender address while still passing validation checks.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Improper Encoding or Escaping of Output

RCE

Weakness Enumeration

CWE-116

CWE-20

Related Identifiers

CVE-2025-61084

Affected Products

Mdaemon Email Server

References · 3

• 🔥 https://github.com/x00nullbit/CVE-References/blob/main/CVE-2025-61084/README.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-61084 · Security Note
• https://t.me/CVEtracker/36620 · Telegram Post