Vulnerability · Published Feb 19, 2026 · Assigned by VulnCheck

CVE-2026-23608GFI MailEssentials AI < 22.4 Email Management Mail Monitoring Rule Stored XSS

Medium 5.4

In plain English

A medium-severity cross-site scripting in MailEssentials AI from GFI Software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.2%top 89.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the Mail Monitoring rule creation endpoint. An authenticated user can supply HTML/JavaScript in the JSON \"name\" field to /MailEssentials/pages/MailSecurity/MailMonitoring.aspx/Save, which is stored and later rendered in the management interface, allowing script execution in the context of a logged-in user.

Affected products (as reported)

Vendor	Product	Versions
GFI Software	MailEssentials AI	0 – before 22.4

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

References

https://gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releases release-notes, patch
https://www.vulncheck.com/advisories/gfi-mailessentials-ai-email-management-mail-monitoring-rule-stored-xss third-party-advisory