Its highly unlikely it will succumb to a buffer overflow exploit and as for the sql injection, knowing how to SQLi myself i have made sure its 99.9% secure also its using a framework with Eloquent for the queries so be sure it will be safe! But the VIN is optional either way it isnt a required field i made sure of that! Thanks please do submit your vehicle!
Just made a massive update, still need to add the ability to upload images and edit your current entries but ive added alot more information now!
Made an update, please check Matt.!