CVE-2021-22966 Improper Privilege Management in Concrete CMS

What is CVE-2021-22966?

CVE-2021-22966 is a high-severity vulnerability in Concretecms Concrete Cms, published on 19 Nov 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

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

Weakness: CWE-863

Which versions are affected by CVE-2021-22966?

2 open source packages ship an affected version, including concrete5/core. It affects 1 product.

Products include Concretecms Concrete Cms.

How do I fix CVE-2021-22966?

Upgrade concrete5/core to 8.5.7 or later.

Is CVE-2021-22966 being exploited?

There is no known exploitation of CVE-2021-22966 in the wild and no public exploit code.

Other vulnerabilities in Concretecms Concrete Cms

• CVE-2023-48648 Concrete CMS allows unauthorized access because directories can be created with insecure permissions Critical 9.8
• CVE-2022-21829 Code injection in concrete CMS Critical 9.8
• CVE-2021-22958 Server-Side Request Forgery vulnerability in concrete5 Critical 9.8
• CVE-2021-40098 Path traversal in n/a Critical 9.8
• CVE-2026-8134 Concrete CMS Vulnerable to Relative Path Traversal Critical 9.4

All Concretecms Concrete Cms vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-j4mv-2rv7-v2j9.