Security advisory

{
  "id": "477c51848b27564823a53f3acb8724b67432b6ee27cda0ddedd2903b91a4991e",
  "url": "https://osv.dev/vulnerability/CVE-2018-20148",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-20148",
    "summary": "In WordPress before 4.9.9 and 5.x before 5.0.1, contributors could conduct PHP object injection attacks via crafted metadata in a wp.getMediaItem XMLRPC call. This is caused by mishandling of serialized data at phar:// URLs in the wp_get_attachment_thumb_file function in wp-includes/post.php.",
    "evidence": "osv:CVE-2018-20148",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2018-20148",
      "aliases": [
        "CVE-2018-20148"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/wordpress/wordpress",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8d87e4a8b8aa7d66a4f5dd3795b5450fa0b76af0"
                },
                {
                  "introduced": "491c67be12ca8a9fe37ae38307ba7e298c976ec3"
                },
                {
                  "fixed": "3d448538caf519c6355bb32c0c8c21da87692855"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.9.9"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "5.0"
                      },
                      {
                        "fixed": "5.0.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.9.8"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20148.json"
          }
        },
        {
          "ranges": [
            {
              "repo": "https://github.com/wordpress/wordpress-develop",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "a9ad836e97a736741122210792c64a6b2ed053ba"
                },
                {
                  "introduced": "b3bf6266acd61682bc654845f621b4426645e324"
                },
                {
                  "fixed": "53a3a5792edc4a55cbc81ebf084db08b93398f80"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "4.9.9"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "5.0"
                      },
                      {
                        "fixed": "5.0.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.9.8"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20148.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:52.544092063Z",
      "provider": "osv",
      "references": [
        "https://codex.wordpress.org/Version_4.9.9",
        "https://lists.debian.org/debian-lts-announce/2019/02/msg00019.html",
        "https://wordpress.org/news/2018/12/wordpress-5-0-1-security-release/",
        "https://wordpress.org/support/wordpress-version/version-5-0-1/",
        "https://wpvulndb.com/vulnerabilities/9171",
        "https://www.debian.org/security/2019/dsa-4401",
        "https://www.zdnet.com/article/wordpress-plugs-bug-that-led-to-google-indexing-some-user-passwords/",
        "https://www.zdnet.com/article/wordpress-vulnerability-affects-a-third-of-most-popular-websites-online/",
        "https://blog.secarma.co.uk/labs/near-phar-dangerous-unserialization-wherever-you-are"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
              "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "8.0"
                  },
                  {
                    "last_affected": "8.0"
                  },
                  {
                    "introduced": "9.0"
                  },
                  {
                    "last_affected": "9.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2018-20148",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 437729,
  "published_at": "2018-12-14T20:29:00.39+00:00"
}