CVE-2026-23609

5.1 mediumEPSS 0.2%

Medium (5.1) in gfi mailessentials. EPSS 0.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

5.1 medium

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

CVSS 3.1

5.4 medium

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 10% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2026-02-19
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

gfi:mailessentials

References

https://gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releases
https://www.vulncheck.com/advisories/gfi-mailessentials-ai-general-settings-perimeter-smtp-servers-description-stored-xss

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