{"id":"CVE-2021-22967","aliases":["GHSA-m2v2-8227-59f5"],"url":"https://o3.security/vulnerability/CVE-2021-22967","summary":"Exposure of sensitive information in concrete5/core","details":"In Concrete CMS (formerly concrete 5) below 8.5.7, IDOR Allows Unauthenticated User to Access Restricted Files If Allowed to Add Message to a Conversation.To remediate this, a check was added to verify a user has permissions to view files before attaching the files to a message in \"add / edit message”.Concrete CMS security team gave this a CVSS v3.1 score of 4.3 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NCredit for discovery Adrian H","published":"2021-11-19T19:15:08.377Z","modified":"2026-07-09T01:30:13.072511Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"concrete5/core","fixedVersion":"8.5.7"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://documentation.concretecms.org/developers/introduction/version-history/857-release-notes"},{"type":"REPORT","url":"https://hackerone.com/reports/869612"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T01:30:13.072511Z"}}