Automation of coordination at vehicular intersection seems to be a desirable technology. It could improve the efficiency of vehicular traffic while reducing the amount of accidents that happens at intersections. There are previous works that demonstrate that such automation is possible; however, there is a lack of research regarding the vulnerability of these systems in case of an attack in the network. In this work, we introduce and categorize the existent algorithms employed for automation of intersections through vehicular communications, and present the work in progress to identify the security vulnerabilities of such solutions in order to propose possible mitigations.