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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,22.4)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "MailEssentials AI", "source": "cna", "vendor": "GFI Software"}, "product": "mailessentials_ai", "vendor": "gfi"}], "analysis": {"en": {"generated_at": "2026-04-17T18:00:43.766245+00:00", "value": {"mitigation_remediation": ["Upgrade to GFI MailEssentials AI version 22.4 or later, which removes the stored XSS flaw.", "Restrict or remove permissions for users to edit IP blocklist descriptions, limiting access to only trusted administrative accounts.", "Configure the web application to escape or sanitize the description field before rendering, or disable the ability to add custom descriptions if it is not required.", "Monitor logs for atypical script execution or changes to IP blocklist entries, indicating potential exploitation."], "summary": {"action": "Apply Patch", "impact": "Stored Cross\u2011Site Scripting (XSS) that executes scripts in the context of authenticated users"}, "threat_synthesis": {"affected_systems": "The vulnerability impacts GFI Software's MailEssentials AI product for all users with access to the IP Blocklist page, specifically versions prior to 22.4. The affected file is /MailEssentials/pages/MailSecurity/ipblocklist.aspx. Any instance running these versions is potentially exposed.", "description_and_impact": "GFI MailEssentials AI versions earlier than 22.4 contain a stored cross\u2011site scripting flaw in the IP Blocklist management interface. An authenticated user can embed arbitrary HTML or JavaScript in the IP description field that is persisted and later rendered in the admin console, enabling script execution under the credentials of any logged\u2011in administrator or user.", "risk_and_exploitability": "The CVSS base score of 5.1 indicates moderate risk, while the EPSS score of less than 1% suggests a low probability of exploitation in the wild. The attack requires legitimate authentication to the web interface and the ability to edit IP blocklist descriptions, so it is a credential\u2011based attack. The vulnerability is not yet catalogued in CISA's KEV list, but it should still be remediated promptly to prevent potential abuse by insiders or compromised credentials."}}}}, "created": "2026-02-20T10:06:08.142634+00:00", "updated": "2026-04-17T18:15:26.759864+00:00", "vendors": ["gfi", "gfi$PRODUCT$mailessentials_ai"]}