{"id":"CVE-2021-38751","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.","modified":"2026-04-10T04:36:50.781060Z","published":"2021-08-16T14:15:07.100Z","references":[{"type":"REPORT","url":"https://github.com/exponentcms/exponent-cms/issues/1544"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/exponentcms/exponent-cms","events":[{"introduced":"0"},{"fixed":"6f21094f2ff194b442a604b5fd23dcebea8b8cc5"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"2.6"}]}}],"versions":["Beta1","beta1.1","v2.0.0","v2.0.0.beta2","v2.0.0.beta2.1","v2.0.0.beta3","v2.0.0.beta4","v2.0.0.release-candidate1","v2.0.0.release-candidate2","v2.0.1","v2.0.1patch1","v2.0.2","v2.0.3","v2.0.9","v2.0.9patch1","v2.0.9patch2","v2.0.9patch3","v2.0.9patch4","v2.0.9patch5","v2.1.0","v2.1.1","v2.1.2","v2.1.3","v2.1.4","v2.2.0","v2.2.0patch1","v2.2.0patch2","v2.2.0patch3","v2.2.0patch4","v2.2.0patch5","v2.2.1","v2.2.2","v2.2.2patch1","v2.2.2patch2","v2.2.3","v2.2.3patch1","v2.2.3patch2","v2.2.3patch3","v2.2.3patch4","v2.3.0","v2.3.0patch1","v2.3.0patch2","v2.3.0patch3","v2.3.0patch4","v2.3.1","v2.3.1patch4","v2.3.2","v2.3.2patch1","v2.3.2patch2","v2.3.3","v2.3.3patch1","v2.3.4","v2.3.4patch1","v2.3.5","v2.3.5patch1","v2.3.5patch2","v2.3.6","v2.3.7","v2.3.7patch1","v2.3.7patch2","v2.3.7patch3","v2.3.7patch4","v2.3.8","v2.3.8patch1","v2.3.8patch2","v2.3.8patch3","v2.3.8patch4","v2.3.8patch5","v2.3.8patch6","v2.3.9","v2.3.9patch1","v2.4.0","v2.4.0patch1","v2.4.0patch2","v2.4.0patch3","v2.4.0patch4","v2.4.0patch5","v2.4.1","v2.4.1patch1","v2.4.1patch2","v2.4.1patch3","v2.4.1patch4","v2.4.1patch5","v2.4.1patch6","v2.4.2","v2.4.2patch1","v2.4.2patch2","v2.4.2patch3","v2.4.2patch4","v2.4.2patch5","v2.4.2patch6","v2.4.2patch7","v2.4.3","v2.4.3patch1","v2.5.0","v2.5.0patch1","v2.5.0patch2","v2.5.1","v2.5.1patch1","v2.5.1patch2","v2.5.1patch3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-38751.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N"}]}