Monitor vulnerabilities like this one.
Sign up free to get alerted when software you use is affected.
5.1
GFI MailEssentials Stored Code Injection in Management Interface
CVE-2026-23609
Summary
Authenticated users can inject malicious code into the GFI MailEssentials management interface, potentially allowing them to access sensitive information or take control of the system. This issue affects versions prior to 22.4. Update to version 22.4 or later to resolve the issue.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| gfi | mailessentials | <= 22.4 | – |
Original title
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 i...
Original description
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.
nvd CVSS3.1
5.4
nvd CVSS4.0
5.1
Vulnerability type
CWE-79
Cross-site Scripting (XSS)
Published: 19 Feb 2026 · Updated: 11 Mar 2026 · First seen: 6 Mar 2026