TI-2021-05828 Aliases CVE-2021-22967 GHSA-m2v2-8227-59f5

Authorization bypass in https://github.com/concrete5/concrete5

LOW 35CWE-639Published 2021-11-19 · Updated 2024-08-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass, Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-639 and CWE-200.

Summary

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

Why it matters now

EPSS 0.01146 66th percentileScored 2026-11-07

Fix Fixed concrete5/core (Packagist): 8.5.7

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	https://github.com/concrete5/concrete5	Affected version - Concrete 8.5.6 and below. Fixed version 9.0 and 8.5.7	—	No fix listed	CNA
—	concrete5/core (Packagist)	before 8.5.7	8.5.7	Patch available	GHSA-m2v2-8227-59f5

https://github.com/concrete5/concrete5 Vendor— Affected Affected version - Concrete 8.5.6 and below. Fixed version 9.0 and 8.5.7 Fixed in — No fix listed CNA
concrete5/core (Packagist) Vendor— Affected before 8.5.7 Fixed in 8.5.7 Patch available GHSA-m2v2-8227-59f5

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:concretecms:concrete_cms::::::::	before 8.5.7	Vulnerable	Concrete CMS

cpe:2.3:a:concretecms:concrete_cms:*:*:*:*:*:*:*:* Versions before 8.5.7 Vulnerable ·Concrete CMS

Remediation

Fix · GHSA-m2v2-8227-59f5 concrete5/core (Packagist) Fixed in 8.5.7 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2021-22967
2026-10-03 Alias added: GHSA-m2v2-8227-59f5

References

Advisory 2

Other 1

https://hackerone.com/reports/869612

TI-2026-23602 ConcreteCMS v9.4.7 contains a Denial of Service (DoS) vulnerability in the File Manager… CVSS 3.1MEDIUM 6.5
TI-2023-23992 A Cross Site Scripting (XSS) vulnerability in Concrete CMS from versions 9.2.0 to 9.2.2… CVSS 3.1MEDIUM 5.4
TI-2023-26495 Concrete CMS before 8.5.13 and 9.x before 9.2.2 allows unauthorized access because… CVSS 3.1CRITICAL 9.8
TI-2026-14907 Missing authorization in Concrete CMS CVSS 4.0HIGH 8.7
TI-2022-06200 Cleartext transmission of sensitive information in https://github.com/concrete5/concrete5 CVSS 3.1CRITICAL 9.8
TI-2021-17294 An issue was discovered in Concrete CMS through 8.5.5. CVSS 3.1CRITICAL 9.8

See all 197 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences