CVE-2026-23611: GFI MailEssentials AI < 22.4 Anti-Spam IP Blocklist Description Stored XSS

Published Feb 19, 2026
·
Updated

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.

Affected Software

2 affected components
GFI Software MailEssentials AI<22.4
GFI MailEssentials<22.4

Event History

Feb 19, 2026
CVE Published
via MITRE·05:57 PM
Data Sourced
via MITRE·05:57 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·06:24 PM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2026-23611?

CVE-2026-23611 is classified as a medium severity vulnerability due to its potential for exploitation via stored cross-site scripting.

2

How do I fix CVE-2026-23611?

To fix CVE-2026-23611, upgrade GFI MailEssentials AI to version 22.4 or later.

3

What type of attack does CVE-2026-23611 enable?

CVE-2026-23611 enables a stored cross-site scripting attack, allowing an attacker to inject malicious scripts.

4

Who is affected by CVE-2026-23611?

CVE-2026-23611 affects authenticated users of GFI MailEssentials AI versions prior to 22.4.

5

Where does CVE-2026-23611 occur within the application?

CVE-2026-23611 occurs on the IP Blocklist management page of GFI MailEssentials AI.

Contact

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