Vulnerability · Published Nov 19, 2021 · Assigned by hackerone

CVE-2021-22967

High 7.5

In plain English

A high-severity authorization bypass via user-controlled key in https://github.com/concrete5/concrete5. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 67% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.5High

Exploit odds (30 days)1.1%top 33.1% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

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

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	concrete5/core	8.5.7	GHSA-m2v2-8227-59f5

Affected products (as reported)

Vendor	Product	Versions
n/a	https://github.com/concrete5/concrete5	Affected version - Concrete 8.5.6 and below. Fixed version 9.0 and 8.5.7

Weakness: CWE-639

References

https://documentation.concretecms.org/developers/introduction/version-history/857-release-notes x_refsource_MISC
https://hackerone.com/reports/869612 x_refsource_MISC