someone upgraded CGI.pm here, now see lots of this warning in logs. Google shows - http://blog.gerv.net/2014/10/new-class-of-vulnerability-in-perl-web-applications
but I'm confused still. In reddit terms, ELI5 (explain it like I'm 5). What is the real problem, how do I figure out if the code that throws these warnings is really vulnerable, how do I fix code that is?