CVE-2026-23606
MEDIUMCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Lifecycle Timeline
2Tags
Description
GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the Advanced Content Filtering rule creation workflow. An authenticated user can supply HTML/JavaScript in the ctl00$ContentPlaceHolder1$pv1$txtRuleName parameter to /MailEssentials/pages/MailSecurity/advancedfiltering.aspx, which is stored and later rendered in the management interface, allowing script execution in the context of a logged-in user.
Analysis
GFI MailEssentials AI prior to version 22.4 contains a stored cross-site scripting vulnerability in the Advanced Content Filtering rule creation feature that allows authenticated users to inject malicious scripts into rule names, which are later executed in the browsers of administrators viewing the management interface. An attacker with valid credentials can exploit this to perform actions as a logged-in administrator, including potential unauthorized configuration changes or credential theft. …
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.
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External POC / Exploit Code
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