{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "3.6.4"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "2983d196840a7da2abf62c00ac2f3ee4864179b4"
            }
          ],
          "repo": "https://github.com/joomla/joomla-cms",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "An issue was discovered in components/com_users/models/registration.php in Joomla! before 3.6.5. Incorrect filtering of registration form data stored to the session on a validation error enables a user to gain access to a registered user's account and reset the user's group mappings, username, and password, as demonstrated by submitting a form that targets the `registration.register` task.",
  "id": "CVE-2016-9838",
  "modified": "2026-03-13T21:52:40.097852709Z",
  "published": "2016-12-16T09:59:00.327Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/41157/"
    },
    {
      "type": "ADVISORY",
      "url": "http://www.securityfocus.com/bid/94893"
    },
    {
      "type": "FIX",
      "url": "https://www.joomla.org/announcements/release-news/5693-joomla-3-6-5-released.html"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}