No offense to the author of this post, but everyone knows plug-ins are what you "choose to use". So this post and its topic is non news. There are thousands of insecure, unupdated plug-ins in WordPress's library. How do you "fix" this "problem"?

Don't use them.

As for the developer of this particular plug-in, it wasn't even uploaded to the WordPress plug-in library... You came across it on a third-party site.

I've seen tons of Questionable plugins available on various developers' websites.... I don't call them out as being evil, dumb, etc. I simply just don't use them. I sure as hell don't write them up and give them more publicity.