Sentence:  The real problem is just how easy it is to do. It only takes about three lines of code to attack a vulnerable server, which means attacks based on the vulnerability are well within the reach of even <WSD>pedestrian hackers</WSD> and cybercriminals. 
Meaning of the word marked with <WSD> tags:  A typical hacker; a person who uses a computer to gain unauthorized access without using extraordinary equipment or brilliance.