CVE-2021-22967 Exposure of sensitive information in concrete5/core

What is CVE-2021-22967?

CVE-2021-22967 is a high-severity missing authorization vulnerability in Concretecms Concrete Cms, published on 19 Nov 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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

Weakness: CWE-639

Which versions are affected by CVE-2021-22967?

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-2021-22967?

Upgrade concrete5/core to 8.5.7 or later.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2021-22967 being exploited?

There is no known exploitation of CVE-2021-22967 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-m2v2-8227-59f5.