Vulnerability Details CVE-2026-23609
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 9.5%
CVSS Severity
CVSS v3 Score 5.4
References
Products affected by CVE-2026-23609
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cpe:2.3:a:gfi:mailessentials:20
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cpe:2.3:a:gfi:mailessentials:20.1
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cpe:2.3:a:gfi:mailessentials:20.2
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cpe:2.3:a:gfi:mailessentials:20.3
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cpe:2.3:a:gfi:mailessentials:21.0
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cpe:2.3:a:gfi:mailessentials:21.1
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cpe:2.3:a:gfi:mailessentials:21.2
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cpe:2.3:a:gfi:mailessentials:21.3
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cpe:2.3:a:gfi:mailessentials:21.4
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cpe:2.3:a:gfi:mailessentials:21.5
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cpe:2.3:a:gfi:mailessentials:21.6
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cpe:2.3:a:gfi:mailessentials:21.7
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cpe:2.3:a:gfi:mailessentials:21.8