Security :: Editing Content And Concerns?

I needed a way to let the people who use my websites edit certain content.

I had no luck in dealing with DotNetnuke, Umbraco and other CMS packages out.

So what I did instead was, I used labels to hold the content of certain pages, and I allow users, only if they have administrator rights, to edit that content by using a free text editor called FreeTextBox, which is an state of the art control.

it works like this:

If (admin)

{
textEditor.visible = true;
lblContent.text = textEditor.text;
}

It does what I want it to do.

Since I'm not very experinced I'm worried that this approach may expose my web application to security risks, or there might be a better way of doing this.