GFI MailEssentials AI up to 22.3 Management Interface PerimeterSMTPServers.aspx ctl00$ContentPlaceHolder1$pv3$txtDescription cross site scripting

Summaryinfo

A vulnerability was found in GFI MailEssentials AI up to 22.3. It has been classified as problematic. This affects an unknown function of the file /MailEssentials/pages/MailSecurity/PerimeterSMTPServers.aspx of the component Management Interface. This manipulation of the argument ctl00$ContentPlaceHolder1$pv3$txtDescription causes cross site scripting. This vulnerability is handled as CVE-2026-23609. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in GFI MailEssentials AI up to 22.3 and classified as problematic. Affected by this vulnerability is an unknown code block of the file /MailEssentials/pages/MailSecurity/PerimeterSMTPServers.aspx of the component Management Interface. The manipulation of the argument ctl00$ContentPlaceHolder1$pv3$txtDescription with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect integrity. The summary by CVE is:

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.

The weakness was released by Alex Williams. The advisory is shared at gfi.ai. This vulnerability is known as CVE-2026-23609 since 01/14/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

By approaching the search of inurl:MailEssentials/pages/MailSecurity/PerimeterSMTPServers.aspx it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 22.4 eliminates this vulnerability.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Artificial Intelligence Software

Vendor

• GFI

Name

• MailEssentials AI

Version

• 22.0
• 22.1
• 22.2
• 22.3

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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