CVE-2026-23611

Medium

Description

GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the IP Blocklist management page. An authenticated user can supply HTML/JavaScript in the ctl00$ContentPlaceHolder1$pv1$txtIPDescription parameter to /MailEssentials/pages/MailSecurity/ipblocklist.aspx, which is stored and later rendered in the management interface, allowing script execution in the context of a logged-in user.

SeverityMedium

CVSS5.4

Exploit probability—

ProductGfi Mailessentials

PublishedFeb 19, 2026

First seenFeb 19, 2026

Weakness typeCWE-79Cross-site scripting (XSS)

How to fix

Update

gfi mailessentials22.4 or later

Patches

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

Affected products

Product	Affected versions	Fixed in
gfi mailessentials	v < 22.4	22.4

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