CVE-2026-23616

MEDIUM 5.4CVE-2026-23616 · Published 19/02/2026 · updated 17/06/2026

In short

CVE-2026-23616 is a MEDIUM (CVSS 5.4) vulnerability affecting mailessentials (gfi).
Chance of exploitation in the next 30 days (EPSS): 0.21%, higher than 10.7% of all vulnerabilities.
Fix: update to 22.4 or later.

Package	Affected versions	Patched versions
mailessentials gfi	`< 22.4`	`22.4`

Description

GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the Anti-Spoofing configuration page. An authenticated user can supply HTML/JavaScript in the ctl00$ContentPlaceHolder1$AntiSpoofingGeneral1$TxtSmtpDesc parameter to /MailEssentials/pages/MailSecurity/AntiSpoofing.aspx, which is stored and later rendered in the management interface, allowing script execution in the context of a logged-in user.

References

gfi.ai/products-and-solutions/network-security-solutions/mailessentials/resources/documentation/product-releases · Release Notes
vulncheck.com/advisories/gfi-mailessentials-ai-anti-spam-anti-spoofing-description-stored-xss · Third Party Advisory

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Package

Affected versions

Patched versions

mailessentials

gfi

< 22.4

22.4

Description

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