CyberRota Analysis
AI-GeneratedThe REST API user creation endpoint in Concrete CMS versions 9.2.0 to 9.5.3 lacks proper permission checks, allowing any valid OAuth token with the users:add scope to create user accounts without email verification or admin approval. This vulnerability could lead to unauthorized users gaining access to edit page content, potentially enabling stored cross-site scripting attacks and further system compromise. Organizations using affected versions of Concrete CMS should prioritize applying security updates to mitigate this risk.
Original NVD Description
n Concrete CMS 9.2.0 through 9.5.3, the REST API user creation endpoint (POST /ccm/api/1.0/users, the add() method of concrete/src/Api/Controller/Users.php) did not perform a permission check before creating an account. As a result, any valid OAuth token carrying the users:add scope, including a client_credentials token with no associated user context, could create active, validated user accounts, bypassing email verification and administrator approval. Under default registration settings the created accounts could then edit page content, providing a path to stored cross-site scripting and further compromise. The Concrete CMS security team gave this vulnerability a CVSS v4.0 score of 2.1 with vector CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N. Thanks Winston Crooker for reporting.
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