CVE-2025-61084 Other in n/a
Attackers can spoof email senders by exploiting Unicode handling in SPF/DKIM validation, bypassing anti-spoofing protections in MDaemon Mail Server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-61084?
CVE-2025-61084 is a high-severity vulnerability in n/a, published on 5 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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. 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.
Which versions are affected by CVE-2025-61084?
How do I fix CVE-2025-61084?
No fix has been published for CVE-2025-61084 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-61084 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-61084 exists.
Sources
Also known as GHSA-x43x-2mp4-28j4.