Security advisory

{
  "id": "540676a9a1d2faa959802ae6e7202f0f22019f4f771151498dedb2cf5d562dee",
  "url": "https://osv.dev/vulnerability/CVE-2016-8870",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2016-8870",
    "summary": "The register method in the UsersModelRegistration class in controllers/user.php in the Users component in Joomla! before 3.6.4, when registration has been disabled, allows remote attackers to create user accounts by leveraging failure to check the Allow User Registration configuration setting.",
    "evidence": "osv:CVE-2016-8870",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2016-8870",
      "aliases": [
        "CVE-2016-8870"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/joomla/joomla-cms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "2e0aaf4d8144ec083aead8703b6e1ab2b978ad75"
                },
                {
                  "fixed": "bae1d43938c878480cfd73671e4945211538fdcf"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:joomla:joomla\\!:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "3.6.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "bae1d43938c878480cfd73671e4945211538fdcf"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.6.3",
            "3.6.3-rc3",
            "3.6.3-rc2",
            "3.6.3-rc1",
            "3.6.2",
            "3.6.1",
            "3.6.1-rc2",
            "3.6.1-rc1",
            "3.6.0",
            "3.6.0-rc2",
            "3.6.0-rc",
            "3.6.0-beta2",
            "3.6.0-beta1",
            "3.6.0-alpha",
            "3.5.1",
            "3.5.1-rc2",
            "3.5.1-rc",
            "3.5.0",
            "3.5.0-rc4",
            "3.5.0-rc2",
            "3.5.0-rc",
            "3.5.0-beta5",
            "3.5.0-beta4",
            "3.5.0-beta3",
            "3.5.0-beta2",
            "3.4.5",
            "3.5.0-beta",
            "3.4.4",
            "3.4.4-rc2",
            "3.4.4-rc",
            "3.4.3",
            "3.4.2",
            "3.4.2-rc",
            "3.4.1",
            "3.4.1-rc2",
            "3.4.1-rc",
            "3.4.0",
            "3.4.0-rc",
            "3.4.0-beta3",
            "3.4.0-beta2",
            "3.4.0-beta1",
            "3.2.4",
            "3.3.0",
            "3.2.3",
            "3.2.2",
            "3.2.1",
            "3.2.0",
            "3.1.5",
            "3.2.0.rc",
            "3.2.0.beta",
            "3.2.0.alpha",
            "3.1.1",
            "3.0.3",
            "3.1.0_beta5",
            "3.1.0_beta4",
            "3.1.0_beta3",
            "3.1.0_beta2",
            "3.1.0_beta1",
            "3.0.1",
            "3.0.0",
            "3.0.0_beta1",
            "3.0.0_alpha-2",
            "3.0.0_alpha-1",
            "2.5.6",
            "2.5.5",
            "2.5.4",
            "2.5.1",
            "2.5.0",
            "2.5.0_beta2",
            "2.5.0_beta1",
            "1.7.3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-8870.json"
          }
        }
      ],
      "modified": "2026-10-20T10:47:58.764852073Z",
      "provider": "osv",
      "references": [
        "https://medium.com/%40showthread/joomla-3-6-4-account-creation-elevated-privileges-write-up-and-exploit-965d8fb46fa2#.rq4qh1v4r",
        "https://developer.joomla.org/security-centre/659-20161001-core-account-creation.html",
        "https://github.com/joomla/joomla-cms/commit/bae1d43938c878480cfd73671e4945211538fdcf",
        "https://blog.sucuri.net/2016/10/details-on-the-privilege-escalation-vulnerability-in-joomla.html",
        "https://www.exploit-db.com/exploits/40637/"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2016-8870",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 379885,
  "published_at": "2016-11-04T21:59:08.677+00:00"
}