CVE-2026-23604
Received Received - Intake

Stored XSS in GFI MailEssentials AI Keyword Filtering Module

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 Keyword Filtering rule creation workflow. An authenticated user can supply HTML/JavaScript in the ctl00$ContentPlaceHolder1$pv1$TXB_RuleName parameter to /MailEssentials/pages/MailSecurity/contentchecking.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
2026-07-06
AI Q&A
2026-02-19
EPSS Evaluated
2026-07-05
NVD
CVE-2026-23604
EUVD
EUVD-2026-7804

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 exists in GFI MailEssentials AI versions prior to 22.4 and is a stored cross-site scripting (XSS) issue. An authenticated user can inject HTML or JavaScript code into the Keyword Filtering rule creation workflow by supplying malicious input in the ctl00$ContentPlaceHolder1$pv1$TXB_RuleName parameter on the contentchecking.aspx page. This malicious code is then stored and later executed in the context of a logged-in user's management interface, potentially allowing unauthorized script execution.

Impact Analysis

The impact of this vulnerability is that an attacker with authenticated access can execute arbitrary scripts within the management interface of GFI MailEssentials AI. This can lead to unauthorized actions being performed on behalf of the logged-in user, such as stealing session tokens, manipulating the interface, or performing other malicious activities within the scope of the user's permissions.

Compliance Impact

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