TI-2021-05827 Aliases CVE-2021-22966 GHSA-j4mv-2rv7-v2j9

Incorrect authorization in https://github.com/concrete5/concrete5

MEDIUM 40CWE-863Published 2021-11-19 · Updated 2024-08-03

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-863 and CWE-269.

Summary

Privilege escalation from Editor to Admin using Groups in Concrete CMS versions 8.5.6 and below. If a group is granted "view" permissions on the bulkupdate page, then users in that group can escalate to being an administrator with a specially crafted curl. Fixed by adding a check for group permissions before allowing a group to be moved. Concrete CMS Security team CVSS scoring: 7.1 AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:HCredit for discovery: "Adrian Tiron from FORTBRIDGE ( https://www.fortbridge.co.uk/ )"This fix is also in Concrete version 9.0.0

Why it matters now

EPSS 0.00981 62nd 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	Fixed in version 9 and in version 8.5.7	—	No fix listed	CNA
—	concrete5/core (Packagist)	before 8.5.7	8.5.7	Patch available	GHSA-j4mv-2rv7-v2j9

https://github.com/concrete5/concrete5 Vendor— Affected Fixed in version 9 and in version 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-j4mv-2rv7-v2j9

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-j4mv-2rv7-v2j9 concrete5/core (Packagist) Fixed in 8.5.7 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2021-22966
2026-10-03 Alias added: GHSA-j4mv-2rv7-v2j9

References

Advisory 2

Other 1

https://hackerone.com/reports/1362747

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