If you run a multi-author blog and you’re letting other writers pen their articles directly in your blog’s wp-admin, you will probably want to limit wp-admin functionality – in other words, their access to what they can see or do.
By default, the contributor role, which is the most likely role you’re going to be using for these guest authors, allows access to some things that I don’t think should be accessible in most cases.
Here’s how I address it on my own WordPress sites.
How to Limit WP-Admin Functionality Security Logging
The first thing I always do on such blogs is to install the WP Security Audit Log plugin. This is a magnificent plugin that shows all actions taken by any user within your blog.
I’m of the opinion that if you are running a multi-author blog, this is one of the essential plugins you should be using.