{"id":"CVE-2021-40108","details":"An issue was discovered in Concrete CMS through 8.5.5. The Calendar is vulnerable to CSRF. ccm_token is not verified on the ccm/calendar/dialogs/event/add/save endpoint.","modified":"2026-07-08T22:14:11.971261Z","published":"2021-09-27T13:15:08.063Z","references":[{"type":"ADVISORY","url":"https://documentation.concretecms.org/developers/introduction/version-history/856-release-notes"},{"type":"REPORT","url":"https://hackerone.com/reports/1102018"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/concretecms/concretecms","events":[{"introduced":"0"},{"fixed":"f9c8e08d3651a250f42e0c0a8cc18bc64b42733f"}],"database_specific":{"cpe":"cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"8.5.6"}],"source":"CPE_RANGE"}}],"versions":["8.4.1","8.3.1","8.2.1","8.2.0","8.2.0RC2","8.1.0","5.7.5.7","5.7.5.6","5.7.5.5","5.7.5.2","5.7.4.1","5.7.3.1","5.7.3","5.7.2.1","5.7.2","5.7.0.4","5.7.1","5.7.0.3","5.7.0.1","5.7.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-40108.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:H/I:H/A:H"}]}