CVE-2026-23621

MEDIUM 4.3

GFI MailEssentials AI < 22.4 ListServer.IsPathExist() Absolute Directory Traversal to File Enumeration

CVSS Score

4.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-203
Vendor	gfi software
Product	mailessentials ai
Published	Feb 19, 2026
Last Updated	Mar 2, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

GFI Software / MailEssentials AI

0 < 22.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

gfi.ai: https://gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releases vulncheck.com: https://www.vulncheck.com/advisories/gfi-mailessentials-ai-listserver-ispathexist-absolute-directory-traversal-to-file-enumeration

Credits

Alex Williams from Pellera Technologies VulnCheck