CVE-2021-22967: Authorization Bypass Through User-Controlled Key

November 23, 2021 (updated November 24, 2021)

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

References

documentation.concretecms.org/developers/introduction/version-history/857-release-notes
github.com/advisories/GHSA-m2v2-8227-59f5
hackerone.com/reports/869612
nvd.nist.gov/vuln/detail/CVE-2021-22967

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