CVE-2021-22966

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

Category

8.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.25%
Vendor Advisory concretecms.org
Affected: n/a https://github.com/concrete5/concrete5
Published at:
Updated at:

References

Link Tags
https://documentation.concretecms.org/developers/introduction/version-history/857-release-notes release notes vendor advisory
https://hackerone.com/reports/1362747 permissions required

Frequently Asked Questions

What is the severity of CVE-2021-22966?
CVE-2021-22966 has been scored as a high severity vulnerability.
How to fix CVE-2021-22966?
To fix CVE-2021-22966, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-22966 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-22966 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-22966?
CVE-2021-22966 affects n/a https://github.com/concrete5/concrete5.
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