CVE Feed

    Dashboard / CVE / CVE-2025-34491

    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:Apr 28, 2025
    Last Modified:Nov 19, 2025
    EPS:Apr 28, 2025
    EPSS Score:0.00349
    CVSS Score:8.8

    Affected Products

    Vendor
    Gfi
    Product
    Mailessentials

    Exploits

    https://frycos.github.io/vulns4free/2025/04/28/mailessentials.html

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-586 Object Injection

    Related CVEs

    CVE-2026-23621 (CVSS 5.3) — GFI MailEssentials AI versions prior to 22.4 contain an arbitrary directory existence enumeration vulnerabilit…
    CVE-2026-23620 (CVSS 5.3) — GFI MailEssentials AI versions prior to 22.4 contain an arbitrary file existence enumeration vulnerability in …
    CVE-2026-23619 (CVSS 5.1) — GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the Local …
    CVE-2026-23618 (CVSS 5.1) — GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the Spam K…
    CVE-2026-23617 (CVSS 5.1) — GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the Spam K…
    CVE-2026-23616 (CVSS 5.1) — GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the Anti-S…
    CVE-2026-23615 (CVSS 5.1) — GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the Sender…
    CVE-2026-23614 (CVSS 5.1) — GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the Sender…
    CVE-2026-23613 (CVSS 5.1) — GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the URI DN…
    CVE-2026-23612 (CVSS 5.1) — GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the IP DNS…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High