Vulnerability Monitor

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CVE-2025-34491

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.

Published

2025-04-28T20:15:20.997

Last Modified

2025-05-10T00:58:12.427

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 8.8 (HIGH)

Weaknesses

Type: Secondary
CWE-502
Type: Primary
CWE-502

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	gfi	mailessentials	< 21.8	Yes

References

https://frycos.github.io/vulns4free/2025/04/28/mailessentials.html Exploit ([email protected])
https://gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releases Release Notes ([email protected])