How can you apply cpr in patient with spinal cord injury?

The same as others: Always perform CPR in a patient until you know exactly what the injury is. Spinal cord injury in the thoracic and lumbar spine is compatible with life, and good CPR could save this patient. However, acute high cervical spine injury could render CPR "futile" depending on the exact injury. But unless you know exactly the injury, continue with CPR until someone with medical expertise takes over care.

The same as with a : Patient without such an injury except one has to keep the area of injury that may be unstable, protected. As CPR is done with a patient lying on back on a firm surface, this is usually not a problem unless there is a cervical spine injury that may be unstable that then would need to be protected by someone stabilizing the head and neck during cpr. This ideally should be a trained medical person.