{
  "id": "CVE-2020-13671",
  "url": "https://spydr.io/cve/CVE-2020-13671",
  "published": "2020-11-20T16:15:15.433Z",
  "modified": "2026-06-17T02:53:32.867Z",
  "score": 8.8,
  "severity": "high",
  "cvss_version": "3.1",
  "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "score_source": "NVD",
  "epss": 0.3535,
  "epss_percentile": 0.98412,
  "exploited": true,
  "kev": {
    "added": "2022-01-18",
    "due": "2022-07-18",
    "action": "Apply updates per vendor instructions.",
    "ransomware": "Unknown",
    "name": "Drupal core Un-restricted Upload of File",
    "notes": "https://nvd.nist.gov/vuln/detail/CVE-2020-13671"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "Drupal"
  ],
  "products": [
    "Drupal Core"
  ],
  "cwes": [
    "CWE-434"
  ],
  "description": "Drupal core does not properly sanitize certain filenames on uploaded files, which can lead to files being interpreted as the incorrect extension and served as the wrong MIME type or executed as PHP for certain hosting configurations. This issue affects: Drupal Drupal Core 9.0 versions prior to 9.0.8, 8.9 versions prior to 8.9.9, 8.8 versions prior to 8.8.11, and 7 versions prior to 7.74.",
  "status": "Analyzed",
  "score_type": "Primary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 8.8,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5KSFM672XW3X6BR7TVKRD63SLZGKK437/",
      "tags": [
        "Mailing List",
        "Release Notes"
      ]
    },
    {
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KWM4CTMEGAC4I2CHYNJVSROY4CVXVEUT/",
      "tags": [
        "Mailing List",
        "Release Notes"
      ]
    },
    {
      "url": "https://www.drupal.org/sa-core-2020-012",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-13671",
      "tags": [
        "US Government Resource"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2020-13671",
  "covered_in": [],
  "attribution": [
    {
      "source": "NVD",
      "url": "https://nvd.nist.gov",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "source": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "notice": "Known exploited vulnerabilities from the CISA KEV catalog."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss",
      "notice": "Exploit prediction scores from FIRST EPSS."
    }
  ]
}