CVE-2026-23613

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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": "2026-04-16T16:51:24.384995+00:00", "value": {"mitigation_remediation": ["Upgrade GFI MailEssentials AI to version 22.4 or later, which removes the stored XSS vulnerability.", "If an upgrade is not immediately possible, restrict the URI DNS Blocklist configuration page to the most trusted roles or disable the feature entirely.", "Enforce server\u2011side filtering to strip all HTML and JavaScript from the ctl00$ContentPlaceHolder1$pv1$TXB_URIs parameter before storage.", "Monitor the management interface for unexpected script execution or abnormal activity."], "summary": {"action": "Patch", "impact": "Script execution (XSS)"}, "threat_synthesis": {"affected_systems": "The affected product is GFI MailEssentials AI from GFI Software. All releases prior to version 22.4 are vulnerable; any installation using those older versions is at risk. No specific patch version is listed beyond the recommendation to upgrade to 22.4 or later.", "description_and_impact": "GFI MailEssentials AI versions prior to 22.4 contain a stored cross\u2011site scripting vulnerability in the URI DNS Blocklist configuration page. An authenticated user can supply arbitrary HTML/JavaScript in the ctl00$ContentPlaceHolder1$pv1$TXB_URIs parameter that is stored and later rendered in the management interface, allowing script execution in the context of a logged\u2011in user. This flaw enables an attacker to run malicious code in the victim\u2019s browser, potentially hijacking sessions, stealing credentials, or performing client\u2011side actions that could lead to data exposure or further exploitation.", "risk_and_exploitability": "The vulnerability has a CVSS score of 5.1 with an EPSS of less than 1\u202f%, indicating low to moderate exploitation probability and no current listing in the CISA KEV catalog. Because the attack requires authenticated access, exploitation is limited to users with management privileges; there is no public exploit reported so far. Nonetheless, the stored payload is executed for all viewing users, so a single compromised account can affect a broader active user base, warranting timely mitigation."}}}}, "created": "2026-02-20T10:06:06.501924+00:00", "updated": "2026-04-16T17:00:09.371202+00:00", "vendors": ["gfi", "gfi$PRODUCT$mailessentials_ai"]}