MUST READ: What You Need to Know About the Shellshock Hack
The existence of Shellshock hack (AKA the Bash Bug), was first made public on Wednesday, the 24th, and is being dubbed the most serious security flaw since Heartbleed first made waves back in April. The Common Vulnerability Scoring System rated Heartbleed at a 5 in a 10 point scoring system, while Shellshock was given a