CVE-2026-23621 — Observable Discrepancy in Software Mailessentials AI

CWE-203 — Observable Discrepancy3 documents3 sources
Severity
5.3MEDIUMNVD
EPSS
0.0%
top 89.74%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
GFI Software Mailessentials AIGFI Mailessentials
Timeline
PublishedFeb 19

Description

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

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Affected Packages2 packages

▶NVDgfi/mailessentials< 22.4

🔴Vulnerability Details

2
GHSA
GHSA-pcxg-vcf2-rp56: GFI MailEssentials AI versions prior to 22↗2026-02-19
▶
CVEList
GFI MailEssentials AI < 22.4 ListServer.IsPathExist() Absolute Directory Traversal to File Enumeration↗2026-02-19
▶
CVE-2026-23621 — Observable Discrepancy | cvebase