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CVE-2026-9558

Estado: AplazadaCrítica (9.9)—

A Server-Side Template Injection (SSTI) vulnerability exists in Mautic's theme engine. The platform renders uploaded Twig templates without a sandbox or strict function restrictions. Authenticated users with permissions to create or upload themes can abuse this to execute arbitrary code on the hosting server (Remote Code Execution) or access restricted system files and configuration settings.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

SSTI en motor Twig sin sandbox: autenticado (PR:L) accede a servicio remoto para ejecutar código arbitrario (T1059) y leer ficheros/configuración (T1005, T1552). Vector CVSS AV:N/PR:L dicta T1210.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementDisable or Remove Feature or ProgramAuditUpdate SoftwareActive Directory ConfigurationVulnerability Scanning

Tecnologías afectadas (2)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Mautic — MauticAITwig — TwigAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-9558",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-9558",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-29T10:48:50.985840Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security@mautic.org",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 9.9,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 6,
        "exploitabilityScore": 3.1
      }
    ]
  },
  "affected": [
    {
      "source": "security@mautic.org",
      "affectedData": [
        {
          "repo": "https://github.com/mautic/mautic",
          "versions": [
            {
              "status": "affected",
              "version": "1.3.0",
              "lessThan": "4.4.20",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.0.0",
              "lessThan": "5.2.11",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.0.0",
              "lessThan": "6.0.9",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "7.0.0",
              "lessThan": "7.1.2",
              "versionType": "semver"
            }
          ],
          "packageName": "mautic/core",
          "collectionURL": "https://packagist.org",
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-05-29T11:16:17.980",
  "references": [
    {
      "url": "https://github.com/mautic/mautic/security/advisories/GHSA-9fx4-7cmj-47vg",
      "source": "security@mautic.org"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@mautic.org",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1336"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A Server-Side Template Injection (SSTI) vulnerability exists in Mautic's theme engine. The platform renders uploaded Twig templates without a sandbox or strict function restrictions. Authenticated users with permissions to create or upload themes can abuse this to execute arbitrary code on the hosting server (Remote Code Execution) or access restricted system files and configuration settings."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de inyección de plantillas del lado del servidor (SSTI) existe en el motor de temas de Mautic. La plataforma renderiza plantillas Twig subidas sin un sandbox o restricciones estrictas de funciones. Usuarios autenticados con permisos para crear o subir temas pueden abusar de esto para ejecutar código arbitrario en el servidor de alojamiento (Ejecución remota de código) o acceder a archivos de sistema restringidos y configuraciones."
    }
  ],
  "lastModified": "2026-07-21T12:10:00.090",
  "sourceIdentifier": "security@mautic.org"
}