/Vulnerability Library

Concrete CMS - User Enumeration

CVE-2026-18110
Early Release

Description

Concrete CMS versions 9.0.0 through 9.5.2 are vulnerable to unauthenticated user enumeration via a missing authorization check in the "Preview As User" panel (concrete/controllers/panel/page/preview_as_user.php).

Severity

High

CVSS Score

7.5

Affected Product

concretecms

Published Date

October 24, 2026

Template Author

community

CVE-2026-18110.yaml
7.5Score

CVSS Metrics

CVSS Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVE ID:
cve-2026-18110
CWE ID:
cwe-862

References

https://github.com/concretecms/concretecms

Remediation Steps

Update to the latest version beyond 9.5.2 where the authorization check is implemented.