CVE-2026-87031

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...

CVE-2026-87031 Missing authorization in the REST API user creation endpoint in Concrete CMS 9.2.0 through 9.5.3 allows arbitrary account creation

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...

CVE-2026-87031: Missing Authorization

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...