CVE-2020-9309

{
  "id": "CVE-2020-9309",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2020-07-15T21:15:13.740",
  "references": [
    {
      "url": "https://www.silverstripe.org/download/security-releases/CVE-2020-9309",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.silverstripe.org/download/security-releases/CVE-2020-9309",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-434"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Silverstripe CMS through 4.5 can be susceptible to script execution from malicious upload contents under allowed file extensions (for example HTML code in a TXT file). When these files are stored as protected or draft files, the MIME detection can cause browsers to execute the file contents. Uploads stored as protected or draft files are allowed by default for authorised users only, but can also be enabled through custom logic as well as modules such as silverstripe/userforms. Sites using the previously optional silverstripe/mimevalidator module can configure MIME whitelists rather than extension whitelists, and hence prevent this issue. Sites on the Common Web Platform (CWP) use this module by default, and are not affected."
    },
    {
      "lang": "es",
      "value": "Silverstripe CMS versiones hasta 4.5, puede ser susceptible de ejecución de script desde contenidos de carga maliciosos bajo extensiones de archivo permitidas (por ejemplo, código HTML en un archivo TXT). Cuando estos archivos son almacenados como archivos protegidos o borradores, la detección MIME puede causar que los navegadores ejecuten el contenido del archivo. Las cargas almacenadas como archivos protegidos o borradores están permitidas por defecto solo para usuarios autorizados, pero también pueden ser habilitadas por medio de lógica personalizada, así como módulos como silverstripe/userforms. Los sitios que usan el módulo opcional de silverstripe/mimevalidator pueden configurar listas blancas MIME en lugar de listas blancas de extensión y, por lo tanto, impedir este problema. Los sitios en la Common Web Platform (CWP) usan este módulo por defecto y no están afectados"
    }
  ],
  "lastModified": "2026-06-17T03:27:44.233",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:silverstripe:mimevalidator:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2B73DB50-72A1-4602-9844-F39219913D13",
              "versionEndExcluding": "2.0.0"
            },
            {
              "criteria": "cpe:2.3:a:silverstripe:recipe:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E4DB8C57-082C-4489-B296-BD07F20759E3",
              "versionEndExcluding": "4.6.0",
              "versionStartIncluding": "4.0.0"
            }
          ],
          "operator": "OR"
        }
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  ],
  "sourceIdentifier": "cve@mitre.org"
}