CVE-2026-23609

CVSS v3 5.4 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.3 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

G

FI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the Perimeter SMTP Servers configuration page. An authenticated user can supply HTML/JavaScript in the ctl00$ContentPlaceHolder1$pv3$txtDescription parameter to /MailEssentials/pages/MailSecurity/PerimeterSMTPServers.aspx, which is stored and later rendered in the management interface, allowing script execution in the context of a logged-in user.

References

Link	Resource
https://gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releases	Release Notes
https://www.vulncheck.com/advisories/gfi-mailessentials-ai-general-settings-perimeter-smtp-servers-description-stored-xss	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:gfi:mailessentials:*:*:*:*:*:*:*:*

History

20 Feb 2026, 17:29

Type	Values Removed	Values Added
CPE		cpe:2.3:a:gfi:mailessentials::::::::
First Time		Gfi mailessentials Gfi
References	~~() https://gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releases -~~	() https://gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releases - Release Notes
References	~~() https://www.vulncheck.com/advisories/gfi-mailessentials-ai-general-settings-perimeter-smtp-servers-description-stored-xss -~~	() https://www.vulncheck.com/advisories/gfi-mailessentials-ai-general-settings-perimeter-smtp-servers-description-stored-xss - Third Party Advisory

19 Feb 2026, 20:25

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.4

19 Feb 2026, 18:24

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-02-19 18:24

Updated : 2026-02-20 17:29

NVD link : CVE-2026-23609

Mitre link : CVE-2026-23609

CVE.ORG link : CVE-2026-23609

JSON object : View

Products Affected

mailessentials

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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