{"id":"CVE-2021-21265","details":"October is a free, open-source, self-hosted CMS platform based on the Laravel PHP Framework. In October before version 1.1.2, when running on poorly configured servers (i.e. the server routes any request, regardless of the HOST header to an October CMS instance) the potential exists for Host Header Poisoning attacks to succeed. This has been addressed in version 1.1.2 by adding a feature to allow a set of trusted hosts to be specified in the application. As a workaround one may set the configuration setting cms.linkPolicy to force.","aliases":["GHSA-xhfx-hgmf-v6vp"],"modified":"2026-08-07T15:15:02.455815Z","published":"2021-03-10T22:15:12.057Z","references":[{"type":"WEB","url":"https://packagist.org/packages/october/backend"},{"type":"FIX","url":"https://github.com/octobercms/library/commit/f29865ae3db7a03be7c49294cd93980ec457f10d"},{"type":"FIX","url":"https://github.com/octobercms/library/commit/f86fcbcd066d6f8b939e8fe897409d152b11c3c6"},{"type":"FIX","url":"https://github.com/octobercms/october/commit/555ab61f2313f45d7d5d138656420ead536c5d30"},{"type":"FIX","url":"https://github.com/octobercms/october/commit/f638d3f78cfe91d7f6658820f9d5e424306a3db0"},{"type":"FIX","url":"https://github.com/octobercms/october/security/advisories/GHSA-xhfx-hgmf-v6vp"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/octobercms/library","events":[{"introduced":"0"},{"fixed":"f29865ae3db7a03be7c49294cd93980ec457f10d"},{"fixed":"f86fcbcd066d6f8b939e8fe897409d152b11c3c6"}],"database_specific":{"source":"REFERENCES"}}],"versions":["v1.1.0","v1.0.468","v1.0.467","v1.0.466","v1.0.465","v1.0.464","v1.0.463","v1.0.462","v1.0.461","v1.0.460","v1.0.459","v1.0.458","v1.0.457","v1.0.456","v1.0.455","v1.0.454","v1.0.453","v1.0.452","v1.0.447","v1.0.451","v1.0.450","v1.0.449","v1.0.448","v1.0.446","v1.0.445","v1.0.444","v1.0.443","v1.0.442","v1.0.441","v1.0.440","v1.0.439","v1.0.438","v1.0.437","v1.0.436","v1.0.435","v1.0.434","v1.0.433","v1.0.432","v1.0.431","v1.0.430","v1.0.429","v1.0.428","v1.0.427","v1.0.426","v1.0.425","v1.0.423","v1.0.424","v1.0.422","v1.0.421","v1.0.420","v1.0.418","v1.0.417","v1.0.416","v1.0.415","v1.0.414","v1.0.413","v1.0.412","v1.0.411","v1.0.410","v1.0.409","v1.0.408","v1.0.407","v1.0.406","v1.0.405","v1.0.404","v1.0.396","v1.0.403","v1.0.402","v1.0.401","v1.0.400","v1.0.399","v1.0.398","v1.0.397","v1.0.395","v1.0.394","v1.0.393","v1.0.392","v1.0.391","v1.0.390","v1.0.383","v1.0.389","v1.0.388","v1.0.387","v1.0.386","v1.0.385","v1.0.384","v1.0.382","v1.0.381","v1.0.380","v1.0.379","v1.0.378","v1.0.377","v1.0.376","v1.0.375","v1.0.374","v1.0.373","v1.0.372","v1.0.371","v1.0.370","v1.0.367","v1.0.366","v1.0.365","v1.0.362","v1.0.361","v1.0.360","v1.0.359","v1.0.358","v1.0.364","v1.0.363","v1.0.357","v1.0.356","v1.0.355","v1.0.354","v1.0.353","v1.0.352","v1.0.351","v1.0.347","v1.0.346","v1.0.345","v1.0.344","v1.0.343","v1.0.342","v1.0.341","v1.0.340","v1.0.339","v1.0.338","v1.0.337","v1.0.336","v1.0.335","v1.0.334","v1.0.333","v1.0.332","v1.0.331","v1.0.330","v1.0.329","v1.0.328","v1.0.327","v1.0.325","v1.0.324","v1.0.323","v1.0.322","v1.0.321","v1.0.320","v1.0.319"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-21265.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/octobercms/october","events":[{"introduced":"0"},{"fixed":"1b704e0e239e457b4b9a7c5f2c79ac4061c36afc"},{"fixed":"555ab61f2313f45d7d5d138656420ead536c5d30"},{"fixed":"f638d3f78cfe91d7f6658820f9d5e424306a3db0"}],"database_specific":{"cpe":"cpe:2.3:a:octobercms:october:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"1.1.2"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["v1.1.1","v1.1.0","v1.0.468","v1.0.467","v1.0.466","v1.0.464","v1.0.463","v1.0.462","v1.0.461","v1.0.460","v1.0.459","v1.0.458","v1.0.457","v1.0.455","v1.0.456","v1.0.454","v1.0.453","v1.0.452","v1.0.447","v1.0.451","v1.0.450","v1.0.449","v1.0.448","v1.0.446","v1.0.445","v1.0.444","v1.0.443","v1.0.442","v1.0.441","v1.0.440","v1.0.439","v1.0.438","v1.0.437","v1.0.436","v1.0.434","v1.0.433","v1.0.432","v1.0.431","v1.0.430","v1.0.429","v1.0.428","v1.0.427","v1.0.426","v1.0.425","v1.0.424","v1.0.423","v1.0.422","v1.0.421","v1.0.419","v1.0.420","v1.0.415","v1.0.418","v1.0.417","v1.0.416","v1.0.414","v1.0.413","v1.0.411","v1.0.412","v1.0.410","v1.0.409","v1.0.408","v1.0.407","v1.0.406","v1.0.405","v1.0.404","v1.0.396","v1.0.403","v1.0.402","v1.0.401","v1.0.400","v1.0.399","v1.0.398","v1.0.397","v1.0.395","v1.0.394","v1.0.393","v1.0.392","v1.0.391","v1.0.390","v1.0.389","v1.0.388","v1.0.387","v1.0.386","v1.0.385","v1.0.384","v1.0.383","v1.0.382","v1.0.381","v1.0.380","v1.0.379","v1.0.378","v1.0.377","v1.0.376","v1.0.375","v1.0.374","v1.0.373","v1.0.372","v1.0.371","v1.0.370","v1.0.367","v1.0.366","v1.0.365","v1.0.364","v1.0.363","v1.0.362","v1.0.361","v1.0.360","v1.0.359","v1.0.358","v1.0.356","v1.0.355","v1.0.354","v1.0.353","v1.0.352","v1.0.351","v1.0.346","v1.0.345","v1.0.344","v1.0.343","v1.0.342","v1.0.341","v1.0.340","v1.0.338","v1.0.334","v1.0.333","v1.0.331","v1.0.330","v1.0.329","v1.0.328","v1.0.327","v1.0.326","v1.0.325","v1.0.324","v1.0.323","v1.0.322","v1.0.321","v1.0.320","v1.0.319"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-21265.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}