CVE-2025-34491 — Deserialization of Untrusted Data in Mailessentials

CWE-502 — Deserialization of Untrusted Data3 documents3 sources
Severity
8.8HIGHNVD
EPSS
1.2%
top 21.41%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
GFI Mailessentials
Timeline
PublishedApr 28

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages2 packages

▶CVEListV5gfi/mailessentials< 21.8
▶NVDgfi/mailessentials< 21.8

🔴Vulnerability Details

2
GHSA
GHSA-fqqj-qgxm-vg3x: GFI MailEssentials prior to version 21↗2025-04-28
▶
CVEList
GFI MailEssentials < 21.8 MultiNode Insecure Deserialization↗2025-04-28
▶
CVE-2025-34491 — Deserialization of Untrusted Data | cvebase