CVE-2026-23608
Received Received - Intake

Stored XSS in GFI MailEssentials AI Mail Monitoring Endpoint

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 Mail Monitoring rule creation endpoint. An authenticated user can supply HTML/JavaScript in the JSON \"name\" field to /MailEssentials/pages/MailSecurity/MailMonitoring.aspx/Save, 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
2026-07-06
AI Q&A
2026-02-19
EPSS Evaluated
2026-07-05
NVD
CVE-2026-23608
EUVD
EUVD-2026-7810

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
gfi mailessentials to 22.4 (exc)

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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 is a stored cross-site scripting (XSS) issue found in GFI MailEssentials AI versions prior to 22.4. It occurs in the Mail Monitoring rule creation endpoint, where an authenticated user can input HTML or JavaScript code into the JSON "name" field at the /MailEssentials/pages/MailSecurity/MailMonitoring.aspx/Save URL. This malicious code is then stored and later displayed in the management interface, which causes the script to execute in the context of a logged-in user.

Impact Analysis

The impact of this vulnerability is that an attacker who is authenticated can inject malicious scripts that execute in the context of other logged-in users. This can lead to unauthorized actions being performed on behalf of those users, theft of sensitive information such as session tokens, or other malicious activities within the management interface.

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