Security advisory

{
  "id": "b1329ab484326de9d969a6a3f12094dbed8dac1f1428ebb029fbfcc76073afa0",
  "url": "https://osv.dev/vulnerability/CVE-2021-29447",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-29447",
    "summary": "Wordpress is an open source CMS. A user with the ability to upload files (like an Author) can exploit an XML parsing issue in the Media Library leading to XXE attacks. This requires WordPress installation to be using PHP 8. Access to internal files is possible in a successful XXE attack. This has been patched in WordPress version 5.7.1, along with the older affected versions via a minor release. We strongly recommend you keep auto-updates enabled.",
    "evidence": "osv:CVE-2021-29447",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-29447",
      "aliases": [
        "BIT-wordpress-2021-29447",
        "BIT-wordpress-multisite-2021-29447",
        "CVE-2021-29447",
        "GHSA-rv47-pc52-qrhh"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/wordpress/wordpress",
              "type": "GIT",
              "events": [
                {
                  "introduced": "965fcddcf68cf4fd122ae24b992e242dfea1d773"
                },
                {
                  "fixed": "5e3f55fde8ff1adc4a750b0ed7b20c50068230c0"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "5.6.0"
                      },
                      {
                        "fixed": "5.7.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-29447.json"
          }
        },
        {
          "ranges": [
            {
              "repo": "https://github.com/wordpress/wordpress-develop",
              "type": "GIT",
              "events": [
                {
                  "introduced": "96a6969aab5f0b9362cbc984af230bdfc93022e8"
                },
                {
                  "fixed": "b36d4f9b075a8afe25e36bc9745aad92fe0203ac"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "5.6.0"
                      },
                      {
                        "fixed": "5.7.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-29447.json"
          }
        }
      ],
      "modified": "2026-10-24T10:50:07.669874904Z",
      "provider": "osv",
      "references": [
        "https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rv47-pc52-qrhh",
        "https://lists.debian.org/debian-lts-announce/2021/04/msg00017.html",
        "https://wordpress.org/news/category/security/",
        "https://www.debian.org/security/2021/dsa-4896",
        "https://blog.sonarsource.com/wordpress-xxe-security-vulnerability/"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
              "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "9.0"
                  },
                  {
                    "last_affected": "9.0"
                  },
                  {
                    "introduced": "10.0"
                  },
                  {
                    "last_affected": "10.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2021-29447",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 441989,
  "published_at": "2021-04-15T21:15:17.723+00:00"
}