High severity7.5NVD Advisory· Published Nov 19, 2021· Updated Jun 17, 2026
CVE-2021-22967
CVE-2021-22967
Description
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
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
concrete5/corePackagist | < 8.5.7 | 8.5.7 |
Affected products
3- Concrete CMS/Concrete CMSdescription
Patches
Vulnerability mechanics
References
4- documentation.concretecms.org/developers/introduction/version-history/857-release-notesnvdRelease NotesVendor AdvisoryWEB
- github.com/advisories/GHSA-m2v2-8227-59f5ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-22967ghsaADVISORY
- hackerone.com/reports/869612nvdPermissions RequiredWEB
News mentions
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