I am seeing warnings about:
"TimThumb being a third party script used in many WordPress themes and plugins to resize images.
Unfortunately the timthumb vulnerability which has seen thousands of WordPress sites hacked and exploited since October 2011 is still claiming more victims every day".
Does ATA 3.6.7 use TimThumb??
I am a little concerned about downloading the scanner plugin until I know if ATA is using it.
I see TT has been discussed in the following thread