TI-2026-19022 Aliases CVE-2026-23621 GHSA-pcxg-vcf2-rp56

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

LOW 24CWE-203Published 2026-02-19 · Updated 2026-05-14

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Information disclosure
Confidentiality · integrity · availability: Low · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-203.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00283 20th percentileScored 2026-11-07

Fix Fixed MailEssentials AI (GFI Software): 22.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
GFI Software	MailEssentials AI	before 22.4	22.4	Patch available	CNA

MailEssentials AI VendorGFI Software Affected before 22.4 Fixed in 22.4 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:gfi:mailessentials::::::::	before 22.4	Vulnerable	GFI Software

cpe:2.3:a:gfi:mailessentials:*:*:*:*:*:*:*:* Versions before 22.4 Vulnerable ·GFI Software

Remediation

Fix · CNA MailEssentials AI (GFI Software) Fixed in 22.4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2026-02-19
GFI Software MailEssentials AI 22.4
18 records Highest priority Priority LOW 18 LOW
Other records, highest priority first
- TI-2026-19021 GFI MailEssentials AI < 22.4 ListServer.IsDBExist() Absolute Directory Traversal to File EnumerationPriority LOW 23
- TI-2026-19020 GFI MailEssentials AI < 22.4 General Settings Local Domains Domain Description Stored XSSPriority LOW 23
- TI-2026-19019 GFI MailEssentials AI < 22.4 Anti-Spam Spam Keyword Checking Subject Condition Stored XSSPriority LOW 23
Show all 18 records →

Timeline

2026-10-02 Threatist record created from CVE-2026-23621
2026-10-03 Alias added: GHSA-pcxg-vcf2-rp56

References

Patch 1

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

TI-2025-24524 GFI MailEssentials < 21.8 MultiNode Insecure Deserialization CVSS 3.1HIGH 8.8
TI-2025-24522 GFI MailEssentials < 21.8 Local Privilege Escalation CVSS 3.1HIGH 7.8
TI-2004-01190 A bug in the HTML parser in a certain Microsoft HTML library, as used in various third… CVSS 2.0HIGH 10.0
TI-2025-24523 GFI MailEssentials < 21.8 XXE Arbitrary File Read CVSS 3.1MEDIUM 6.5
TI-2026-19021 GFI MailEssentials AI < 22.4 ListServer.IsDBExist() Absolute Directory Traversal to File Enumeration CVSS 4.0MEDIUM 5.3
TI-2026-19020 GFI MailEssentials AI < 22.4 General Settings Local Domains Domain Description Stored XSS CVSS 4.0MEDIUM 5.1

See all 21 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences