Security advisory

{
  "id": "3de1a7f92b475f09630a05af7edd4d02c3c819ff27c3cd6e79ac616eb4fb4ce1",
  "url": "https://osv.dev/vulnerability/CVE-2020-13671",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-13671",
    "summary": "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.",
    "evidence": "osv:CVE-2020-13671",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-13671",
      "aliases": [
        "BIT-drupal-2020-13671",
        "CVE-2020-13671",
        "DRUPAL-CORE-2020-012",
        "GHSA-68jc-v27h-vhmw"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/drupal/drupal",
              "type": "GIT",
              "events": [
                {
                  "introduced": "497914920385b7016ac9c9367e0198530787adf2"
                },
                {
                  "fixed": "f941729699e7f49901b30f3aaa71449e44a984c0"
                },
                {
                  "introduced": "f2b59e3ae8097ea01d15c708f1267b73794399c0"
                },
                {
                  "fixed": "4ad29cfc1d1cc51fab880312efa53ca9d0084d60"
                },
                {
                  "introduced": "a412ca41cfc0d954fe3cb2dd982dc6ca049b1c70"
                },
                {
                  "fixed": "afd99c2de06fa374c3c0434cb9efe1e2d5a6dcb3"
                },
                {
                  "introduced": "d62812dc17ce593beb2ccd4cdbee1a76c95e3fd7"
                },
                {
                  "fixed": "edaba481ce445487f669deff5cc012af422dc874"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "7.0"
                      },
                      {
                        "fixed": "7.74"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "8.8.0"
                      },
                      {
                        "fixed": "8.8.11"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "8.9.0"
                      },
                      {
                        "fixed": "8.9.9"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:drupal:drupal:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "9.0.0"
                      },
                      {
                        "fixed": "9.0.8"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "7.73",
            "8.8.10",
            "8.9.8",
            "9.0.7",
            "8.8.9",
            "8.9.5",
            "9.0.5",
            "7.72",
            "8.9.4",
            "8.9.3",
            "9.0.3",
            "8.9.2",
            "9.0.2",
            "7.71",
            "8.8.7",
            "8.9.0",
            "9.0.0",
            "8.8.5",
            "8.8.3",
            "8.8.2",
            "8.8.0",
            "7.68",
            "7.64",
            "7.61",
            "7.56",
            "7.55",
            "7.54",
            "7.51",
            "7.50",
            "7.43",
            "7.42",
            "7.40",
            "7.37",
            "7.36",
            "7.33",
            "7.30",
            "7.28",
            "7.25",
            "7.23",
            "7.22",
            "7.17",
            "7.15",
            "7.14",
            "7.12",
            "7.10",
            "7.9",
            "7.8",
            "7.7",
            "7.6",
            "7.4",
            "7.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-13671.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:20.854490397Z",
      "provider": "osv",
      "references": [
        "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-13671",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5KSFM672XW3X6BR7TVKRD63SLZGKK437/",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KWM4CTMEGAC4I2CHYNJVSROY4CVXVEUT/",
        "https://www.drupal.org/sa-core-2020-012"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
              "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*"
            ],
            "vendor_product": "fedoraproject:fedora",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "32"
                  },
                  {
                    "last_affected": "32"
                  },
                  {
                    "introduced": "33"
                  },
                  {
                    "last_affected": "33"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-13671",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 430358,
  "published_at": "2020-11-20T16:15:15.433+00:00"
}