FKIE_CVE-2025-56406

Vulnerability from fkie_nvd - Published: 2025-09-10 14:15 - Updated: 2026-06-17 09:42
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
An issue was discovered in mcp-neo4j 0.3.0 allowing attackers to obtain sensitive information or execute arbitrary commands via the SSE service. NOTE: the Supplier's position is that authentication is not mandatory for MCP servers, and the mcp-neo4j MCP server is only intended for use in a local environment where authentication realistically would not be needed. Also, the Supplier provides middleware to help isolate the MCP server from external access (if needed).
References
cve@mitre.orghttps://github.com/August829/CVEP/issues/1
cve@mitre.orghttps://github.com/neo4j-contrib/mcp-neo4j/issues/124
cve@mitre.orghttps://modelcontextprotocol.io/specification/2025-03-26/basic/authorization
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "cveTags": [
    {
      "sourceIdentifier": "cve@mitre.org",
      "tags": [
        "disputed"
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in mcp-neo4j 0.3.0 allowing attackers to obtain sensitive information or execute arbitrary commands via the SSE service. NOTE: the Supplier\u0027s position is that authentication is not mandatory for MCP servers, and the mcp-neo4j MCP server is only intended for use in a local environment where authentication realistically would not be needed. Also, the Supplier provides middleware to help isolate the MCP server from external access (if needed)."
    },
    {
      "lang": "es",
      "value": "Se descubri\u00f3 un problema en mcp-neo4j 0.3.0 que permite a los atacantes obtener informaci\u00f3n sensible o ejecutar comandos arbitrarios a trav\u00e9s del servicio SSE. NOTA: la postura del proveedor es que la autenticaci\u00f3n no es obligatoria para los servidores MCP, y el servidor MCP mcp-neo4j est\u00e1 destinado \u00fanicamente para su uso en un entorno local donde la autenticaci\u00f3n de forma realista no ser\u00eda necesaria. Adem\u00e1s, el proveedor proporciona middleware para ayudar a aislar el servidor MCP del acceso externo (si es necesario)."
    }
  ],
  "id": "CVE-2025-56406",
  "lastModified": "2026-06-17T09:42:34.360",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-56406",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-09-10T13:58:57.461736Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-09-10T14:15:39.567",
  "references": [
    {
      "source": "cve@mitre.org",
      "url": "https://github.com/August829/CVEP/issues/1"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://github.com/neo4j-contrib/mcp-neo4j/issues/124"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://modelcontextprotocol.io/specification/2025-03-26/basic/authorization"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-77"
        },
        {
          "lang": "en",
          "value": "CWE-200"
        },
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}



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Related by attack behaviour

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