Security advisory

{
  "id": "e6088d1d00089bf9f81b70dbad15d465b934f830952fc8395e4696d393f15f6e",
  "url": "https://osv.dev/vulnerability/CVE-2018-17855",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-17855",
    "summary": "An issue was discovered in Joomla! before 3.8.13. If an attacker gets access to the mail account of an user who can approve admin verifications in the registration process, he can activate himself.",
    "evidence": "osv:CVE-2018-17855",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2018-17855",
      "aliases": [
        "CVE-2018-17855"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/joomla/joomla-cms",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "27ca70a097a3d64f958bfee77a21f33002c33bfc"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:joomla:joomla\\!:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.5.0"
                      },
                      {
                        "fixed": "3.8.13"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.8.11",
            "3.8.8",
            "3.8.7",
            "3.8.12",
            "3.8.12-rc",
            "3.8.11-rc",
            "3.8.6",
            "3.8.10",
            "3.8.9",
            "3.8.4",
            "3.8.9-rc",
            "issues-241-257",
            "3.8.8-rc",
            "3.8.7-rc",
            "3.8.6-rc1",
            "3.8.3",
            "3.8.3-rc",
            "3.8.5",
            "3.8.5-rc",
            "3.8.4-rc2",
            "3.8.4-rc",
            "3.8.2",
            "3.8.1",
            "3.8.0",
            "3.8.2-rc",
            "3.8.1-rc",
            "3.8.0-rc1",
            "3.8.0-beta2",
            "3.8.0-beta4",
            "3.8.0-beta1",
            "3.8.0-beta3",
            "3.7.4-rc1",
            "3.7.4-beta1",
            "3.7.3",
            "3.7.3-rc2",
            "3.7.3-rc1",
            "3.7.3-beta1",
            "3.7.2",
            "3.7.1",
            "3.7.1-rc2",
            "3.7.1-rc1",
            "3.7.0",
            "3.7.0-rc4",
            "3.7.0-rc3",
            "3.7.0-rc2",
            "3.7.0-rc1",
            "3.7.0-beta4",
            "3.7.0-beta3",
            "3.7.0-beta2",
            "3.7.0-beta1",
            "3.7.0-alpha1",
            "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-2018-17855.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:27.034326056Z",
      "provider": "osv",
      "references": [
        "https://developer.joomla.org/security-centre/754-20181004-core-acl-violation-in-com-users-for-the-admin-verification"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2018-17855",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 431737,
  "published_at": "2018-10-09T21:29:00.543+00:00"
}