Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gfi | Mailessentials | < 22.4 |
Related Weaknesses (CWE)
References
- https://gfi.ai/products-and-solutions/network-security-solutions/mailessentials/Release Notes
- https://www.vulncheck.com/advisories/gfi-mailessentials-ai-listserver-ispathexisThird Party Advisory
FAQ
What is CVE-2026-23621?
CVE-2026-23621 is a vulnerability with a CVSS score of 4.3 (MEDIUM). 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...
How severe is CVE-2026-23621?
CVE-2026-23621 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-23621?
Check the references section above for vendor advisories and patch information. Affected products include: Gfi Mailessentials.