Nope. The Security Log entry shows exactly what the issue/problem is. It has nothing to do with your Theme and has to do with the Riva Slider Pro plugin timthumb script simulating an RFI hacking attack against your website. This is fairly common with all plugins and themes that use the timthumb script. The general nature and design of the timthumb script itself is that it appears to be attacking your website using an RFI hacking method. That is just what is with the timthumb script.
You only need to add the plugin skip/bypass rule I posted above and nothing else.