CVE-2025-66492

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Versions 7.2.8 and below, 7.3.1 through 7.3.13, 7.4.0-alpha.1 through 7.4.8 and 7.5.0 through 7.5.1 are vulnerable to XSS when an unsanitized value of the ajax URL query parameter is directly included within the <head> section of the HTML page. An attacker can execute arbitrary scripts in the context of the user's session, potentially leading to Session Hijacking, Data Theft, Defacement and Malware Distribution. This issue is fixed in versions 7.5.2, 7.4.9, 7.3.14, and 7.2.9. To work around this issue, configure a Web Application Firewall (WAF) rule (e.g., ModSecurity) to block requests containing common XSS payload characters in the ajax query parameter. Alternatively, implement server-side sanitization using middleware to strip or escape dangerous characters from the ajax parameter before it reaches the vulnerable rendering logic."}, {"lang": "es", "value": "Masa CMS es una plataforma de gesti\u00f3n de contenido empresarial de c\u00f3digo abierto. Las versiones 7.2.8 e inferiores, 7.3.1 a 7.3.13, 7.4.0-alpha.1 a 7.4.8 y 7.5.0 a 7.5.1 son vulnerables a XSS cuando un valor no saneado del par\u00e1metro de consulta de URL ajax se incluye directamente dentro de la secci\u00f3n <head> de la p\u00e1gina HTML. Un atacante puede ejecutar scripts arbitrarios en el contexto de la sesi\u00f3n del usuario, lo que podr\u00eda conducir a Secuestro de Sesi\u00f3n, Robo de Datos, Desfiguraci\u00f3n y Distribuci\u00f3n de Malware. Este problema est\u00e1 solucionado en las versiones 7.5.2, 7.4.9, 7.3.14 y 7.2.9. Para solucionar este problema, configure una regla de Cortafuegos de Aplicaciones Web (WAF) (p. ej., ModSecurity) para bloquear solicitudes que contengan caracteres de carga \u00fatil XSS comunes en el par\u00e1metro de consulta ajax. Alternativamente, implemente saneamiento del lado del servidor utilizando middleware para eliminar o escapar caracteres peligrosos del par\u00e1metro ajax antes de que llegue a la l\u00f3gica de renderizado vulnerable."}], "id": "CVE-2025-66492", "lastModified": "2026-10-14T17:10:00.210", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 4.7, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-66492", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-12-18T20:37:03.542013Z", "version": "2.0.3"}}]}, "published": "2025-12-12T05:16:12.463", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/MasaCMS/MasaCMS/commit/376c27196b1e2489888b7a000cdf5c45bb85959e"}, {"source": "security-advisories@github.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://github.com/MasaCMS/MasaCMS/security/advisories/GHSA-249c-vqwv-43vc"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

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{"created": "2025-12-12T08:47:49.730136+00:00", "updated": "2025-12-12T08:47:49.730193+00:00", "vendors": ["masacms", "masacms$PRODUCT$masacms"]}