CVE-2026-23620

Medium

Description

GFI MailEssentials AI versions prior to 22.4 contain an arbitrary file existence enumeration vulnerability in the ListServer.IsDBExist() web method exposed at /MailEssentials/pages/MailSecurity/ListServer.aspx/IsDBExist. An authenticated user can supply an unrestricted filesystem path via the JSON key \"path\", which is URL-decoded and passed to File.Exists(), allowing the attacker to determine whether arbitrary files exist on the server.

SeverityMedium

CVSS4.3

Exploit probability—

ProductGfi Mailessentials

PublishedFeb 19, 2026

First seenFeb 19, 2026

Weakness typeCWE-203CWE-203

How to fix

Update

gfi mailessentials22.4 or later

Patches

gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releases

Affected products

Product	Affected versions	Fixed in
gfi mailessentials	v < 22.4	22.4

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