CVE-2026-23609: GFI MailEssentials AI < 22.4 General Settings Perimeter SMTP Servers Description Stored XSS
GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the Perimeter SMTP Servers configuration page. An authenticated user can supply HTML/JavaScript in the ctl00$ContentPlaceHolder1$pv3$txtDescription parameter to /MailEssentials/pages/MailSecurity/PerimeterSMTPServers.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-2026-23609?
CVE-2026-23609 has a medium severity rating due to the potential for stored cross-site scripting attacks.
How do I fix CVE-2026-23609?
To fix CVE-2026-23609, upgrade GFI MailEssentials AI to version 22.4 or later, which addresses this vulnerability.
What type of vulnerability is CVE-2026-23609?
CVE-2026-23609 is classified as a stored cross-site scripting (XSS) vulnerability.
Who is affected by CVE-2026-23609?
CVE-2026-23609 affects users of GFI MailEssentials AI versions prior to 22.4.
What can an attacker do with CVE-2026-23609?
An attacker can exploit CVE-2026-23609 to inject malicious HTML or JavaScript code through the affected parameter, potentially compromising user sessions.