{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "3.0.0"
              },
              {
                "last_affected": "3.9.27"
              }
            ]
          },
          "events": [
            {
              "introduced": "c1acb7e6973bd549fe35a02659fe851ff1a37dfe"
            },
            {
              "last_affected": "4cf3b7c1559e11cb75be6662511b5d7e4da9c550"
            }
          ],
          "repo": "https://github.com/joomla/joomla-cms",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "An issue was discovered in Joomla! 3.0.0 through 3.9.27. Inadequate escaping in the rules field of the JForm API leads to a XSS vulnerability.",
  "id": "CVE-2021-26035",
  "modified": "2026-03-13T21:54:37.655079901Z",
  "published": "2021-07-07T11:15:08.603Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://developer.joomla.org/security-centre/856-20210701-core-xss-in-jform-rules-field.html"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}