CVE-2021-22966

HIGH
8.8
CVSS Score
Published: November 19, 2021 at 06:09 PM UTC
Updated: June 17, 2026 at 03:38 AM UTC
1 product affected across 1 vendorConcrete CMS

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Severity
HIGH8.8
Exploit prediction
EPSS 1.0%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 8.5.7
Affected range stops below 8.5.7, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 9 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-863

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