CVE-2026-18421 Concrete CMS 9.0.0-9.5.2 Boards data source dashboard is missing an authorization check, allowing a low-privileged board editor to modify or delete configured data sources on boards they do not control

Concrete CMS 9 through 9.5.2 does not perform an authorization check in three actions of the Boards data source dashboard controller update, updatedatasource, and deletedatasource, which resolve a ConfiguredDataSource directly from an attacker-supplied identifier without confirming the requester'...