CVE-2026-23606: GFI MailEssentials AI < 22.4 Advanced Content Filtering Rule Stored XSS
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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-23606?
The severity of CVE-2026-23606 is classified as high due to the potential for stored cross-site scripting attacks.
How do I fix CVE-2026-23606?
To fix CVE-2026-23606, upgrade GFI MailEssentials AI to version 22.4 or later.
What type of vulnerability is CVE-2026-23606?
CVE-2026-23606 is a stored cross-site scripting (XSS) vulnerability.
Who is affected by CVE-2026-23606?
CVE-2026-23606 affects users of GFI MailEssentials AI versions prior to 22.4.
What can attackers do with CVE-2026-23606?
Attackers can exploit CVE-2026-23606 to inject malicious HTML/JavaScript code into the application.