WPScan is a really useful WordPress vulrability scanning tool. This tool is based on Ruby and can help you identify what vulrabilities are currently present with the versions of plugins and themes you are using.
To install run rhw following:
sudo apt-get install libcurl4-gnutls-dev libopenssl-ruby libxml2 libxml2-dev libxslt1-dev ruby-dev git
Next download the latest version using Git
git clone https://github.com/wpscanteam/wpscan.git
Now move into the wpscan directory
sudo gem install bundler && bundle install --without test development
To get a list of help options run the following: