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CVE-2025-34491
Published: Apr 28, 2025
Modified: Nov 19, 2025
PUBLISHED
CVSS v3.1
8.8
HIGH
Description
GFI MailEssentials prior to version 21.8 is vulnerable to a .NET deserialization issue. A remote and authenticated attacker can execute arbitrary code by sending crafted serialized .NET when joining to a Multi-Server setup.
| Vendor | Product | Versions |
|---|---|---|
GFI | MailEssentials | affected 0 - < 21.8 |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
References
https://frycos.github.io/vulns4free/2025/04/28/mailessentials.html
technical-description
exploit
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