{
  "id": "CVE-2021-40109",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2021-09-27T13:15:08.107",
  "lastModified": "2021-09-30T15:32:38.833",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "A SSRF issue was discovered in Concrete CMS through 8.5.5. Users can access forbidden files on their local network. A user with permissions to upload files from external sites can upload a URL that redirects to an internal resource of any file type. The redirect is followed and loads the contents of the file from the redirected-to server. Files of disallowed types can be uploaded."
    },
    {
      "lang": "es",
      "value": "Se ha detectado un problema de tipo SSRF en Concrete CMS versiones hasta 8.5.5. Unos usuarios pueden acceder a archivos prohibidos en su red local. Un usuario con permisos para subir archivos desde sitios externos puede subir una URL que redirija a un recurso interno de cualquier tipo de archivo. La redirecci\u00f3n es seguida y carga el contenido del archivo desde el servidor al que se redirige. Los archivos de tipos no permitidos pueden ser cargados"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE",
          "baseScore": 6.4,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 2.7
      }
    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:N",
          "accessVector": "NETWORK",
          "accessComplexity": "LOW",
          "authentication": "SINGLE",
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "availabilityImpact": "NONE",
          "baseScore": 5.5
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 8.0,
        "impactScore": 4.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "8.5.6",
              "matchCriteriaId": "396CE6F6-1989-443E-A894-A2547A0431BB"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://documentation.concretecms.org/developers/introduction/version-history/856-release-notes",
      "source": "cve@mitre.org",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://hackerone.com/reports/1102105",
      "source": "cve@mitre.org",
      "tags": [
        "Permissions Required"
      ]
    }
  ]
}