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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "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": "2026-04-16T16:49:41.282686+00:00", "value": {"mitigation_remediation": ["Upgrade GFI MailEssentials AI to version 22.4 or later.", "Restrict write access to the Local Domains settings field to administrators only, and apply role\u2011based access control.", "Sanitize or encode any user input for domain descriptions before storing and rendering it, in accordance with CWE\u201179 best practices."], "summary": {"action": "Patch", "impact": "Stored XSS allowing script execution within the management interface"}, "threat_synthesis": {"affected_systems": "GFI Software MailEssentials AI, versions before 22.4. All pre\u201122.4 releases are affected; the exact version range is not specified beyond the pre\u201122.4 threshold.", "description_and_impact": "The vulnerability exists in GFI MailEssentials AI prior to version 22.4 and allows an authenticated user to inject arbitrary HTML or JavaScript into the ctl00$ContentPlaceHolder1$Pv3$txtDescription field on the Local Domains settings page. The injected content is stored and later rendered in the management interface, which results in the execution of malicious scripts in the browser session of any logged\u2011in administrator or user. This flaw can be used to steal session cookies, perform phishing, or execute further malicious actions within the context of an authenticated user.", "risk_and_exploitability": "The CVSS base score of 5.1 indicates moderate severity, and the EPSS score of less than 1% implies a very low probability of exploitation at this time. The vulnerability is not listed in the CISA KEV catalog. Exploitation requires access to the web\u2011based administration interface and authenticated credentials with permission to edit the Local Domains settings, suggesting a network\u2011based attack through legitimate user access or credential compromise. No public exploits are documented, but the stored nature of the payload means that once injected, the malicious script will run automatically for any user who views the page in the affected application."}}}}, "created": "2026-02-20T10:06:01.325175+00:00", "updated": "2026-04-16T17:00:09.364294+00:00", "vendors": ["gfi", "gfi$PRODUCT$mailessentials_ai"]}