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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.

PUBLISHED Reserved 2026-01-14 | Published 2026-02-19 | Updated 2026-02-20 | Assigner VulnCheck




MEDIUM: 5.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Problem types

CWE-203 Observable Discrepancy

Product status

Default status
unaffected

Any version before 22.4
affected

Credits

Alex Williams from Pellera Technologies finder

VulnCheck coordinator

References

gfi.ai/...ssentials/resources/documentation/product-releases release-notes patch

www.vulncheck.com/...directory-traversal-to-file-enumeration third-party-advisory

cve.org (CVE-2026-23621)

nvd.nist.gov (CVE-2026-23621)

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