{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "3.8.8"
              },
              {
                "fixed": "3.9.17"
              }
            ]
          },
          "events": [
            {
              "introduced": "28aef911901979246d398f0580c436c87dfec59d"
            },
            {
              "fixed": "7b010b41500bc916273ea82c0ba58bd57a1fe4ce"
            }
          ],
          "repo": "https://github.com/joomla/joomla-cms",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "An issue was discovered in Joomla! before 3.9.17. Incorrect ACL checks in the access level section of com_users allow the unauthorized editing of usergroups.",
  "id": "CVE-2020-11891",
  "modified": "2026-03-13T21:53:02.810502172Z",
  "published": "2020-04-21T17:15:12.757Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://developer.joomla.org/security-centre/809-20200401-core-incorrect-access-control-in-com-users-access-level-editing-function.html"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}