LaraDashboard from 1.4.0 before 1.4.8 contains a race condition vulnerability in RegisterController::register that allows unauthenticated attackers to bypass the per-IP daily registration limit. Attackers can send many concurrent registration requests from one IP so all pass RegistrationGuardService::hasExceededIpLimit before recordRegistration runs, creating accounts in bulk and defeating anti-automation controls.
The product checks the state of a resource before using that resource, but the resource’s state can change between the check and the use in a way that invalidates the results of the check.