This study aims at assessing an online portal where patients with traumatic brain injury (TBI) can carry on memory and attention exercises outside clinic premises. The training took place in a virtual reality (VR) setup where one TBI patient had to complete a set of 10 online VR sessions. The neuropsychological evaluation was carried out with the PASAT (Paced Auditory Serial Addition Task) at pre-, during and post-treatment assessments. The results showed an increase in working memory and attention levels from the first to the final assessment, which can suggest that VR applications may promote the autonomy and increase in overall quality of life of these patients. The average time for task conclusion was 5 min.