Are old server jars dangerous
Think minecraft beta 1.7.3, release <=1.6, they're very old and might contain exploits such as log4shell won't they? Asking as I am considering playing beta 1.7.3 with my friends, but at the same time it feels dangerous. Another question, less related to servers is joining those 1.7.3 servers safe on old clients, I know there are many beta 1.7.3 servers out there.