{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.6"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6f21094f2ff194b442a604b5fd23dcebea8b8cc5"
            }
          ],
          "repo": "https://github.com/exponentcms/exponent-cms",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "A HTTP Host header attack exists in ExponentCMS 2.6 and below in /exponent_constants.php. A modified HTTP header can change links on the webpage to an arbitrary value, leading to a possible attack vector for MITM.",
  "id": "CVE-2021-38751",
  "modified": "2026-03-13T21:56:50.103583594Z",
  "published": "2021-08-16T14:15:07.100Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://github.com/exponentcms/exponent-cms/issues/1544"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}