Vulnerability · Published Nov 19, 2021 · Assigned by hackerone

CVE-2021-22966

High 8.8

In plain English

A high-severity security flaw 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 1.0% (higher than 62% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)8.8High

Exploit odds (30 days)1.0%top 37.6% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

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

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Packagist	concrete5/core	8.5.7	GHSA-j4mv-2rv7-v2j9

Affected products (as reported)

Vendor	Product	Versions
n/a	https://github.com/concrete5/concrete5	Fixed in version 9 and in version 8.5.7

References

https://documentation.concretecms.org/developers/introduction/version-history/857-release-notes x_refsource_MISC
https://hackerone.com/reports/1362747 x_refsource_MISC