I am using the current version of MODx and I was wondering what security issues I should be aware of and how I can try and stop any attacks of that I could expect. As well as the standard install I am using a few downloaded snippets and some bespoke ones.
The most important security measure is to sign up to receive security notices via email, subscripbe to the security notice forum, and check the security notices on the MODx manager home page (there is a tab that shows the security notice feed). Other than that do the standard security that you would normally do on your server.