CVE-2026-23611
Received Received - Intake
Stored XSS in GFI MailEssentials IP Blocklist Management

Publication date: 2026-02-19

Last updated on: 2026-02-20

Assigner: VulnCheck

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.
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Meta Information
Published
2026-02-19
Last Modified
2026-02-20
Generated
2026-06-16
AI Q&A
2026-02-19
EPSS Evaluated
2026-06-14
NVD
CVE-2026-23611
EUVD
EUVD-2026-8394
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
gfi mailessentials to 22.4 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

This vulnerability exists in GFI MailEssentials AI versions prior to 22.4 and is a stored cross-site scripting (XSS) issue found in the IP Blocklist management page.

An authenticated user can input malicious HTML or JavaScript code into a specific parameter (ctl00$ContentPlaceHolder1$pv1$txtIPDescription) on the IP Blocklist page.

This code is then stored and later executed in the context of a logged-in user when the management interface renders it, potentially allowing script execution within the application.

Impact Analysis

The vulnerability allows an authenticated user to execute arbitrary scripts in the context of other logged-in users.

This can lead to unauthorized actions being performed on behalf of users, theft of session tokens, or other malicious activities within the management interface.

Since the vulnerability requires authentication, the risk is limited to users who have access to the system, but it can still compromise the integrity and security of the management interface.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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