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5.1
GFI MailEssentials AI: Stored Scripting Vulnerability in Spam Filter
CVE-2026-23618
Summary
An attacker can execute malicious scripts in GFI MailEssentials AI's Spam Keyword Checking interface if they have an account. This could allow them to access sensitive information or take control of the system. GFI MailEssentials AI versions prior to 22.4 are affected and should be updated to the latest version.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| gfi | mailessentials | <= 22.4 | – |
Original title
GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the Spam Keyword Checking (Subject) conditions interface. An authenticated user can supply HTML/J...
Original description
GFI MailEssentials AI versions prior to 22.4 contain a stored cross-site scripting vulnerability in the Spam Keyword Checking (Subject) conditions interface. An authenticated user can supply HTML/JavaScript in the ctl00$ContentPlaceHolder1$pvSubject$TXB_SubjectCondition parameter to /MailEssentials/pages/MailSecurity/ASKeywordChecking.aspx, which is stored and later rendered in the management interface, allowing script execution in the context of a logged-in user.
nvd CVSS3.1
5.4
nvd CVSS4.0
5.1
Vulnerability type
CWE-79
Cross-site Scripting (XSS)
Published: 19 Feb 2026 · Updated: 11 Mar 2026 · First seen: 6 Mar 2026