Hello.
I’ve received the following massege from my hosting service re. a website of one of my clients:
“We wanted to let you know about a recent security vulnerability regarding the Slider Revolution Plugin for WordPress that you installed on your account. We’ve identified an insecure version of that plugin on your website:

http://www.edenflows.com

More information about this vulnerability is available online:
http://blog.sucuri.net/2014/09/slider-revolution-plugin-critical-vulnerability-being-exploited.html

FOR YOUR PROTECTION ... 
We've disabled the Slider Revolution Plugin for the website referenced above and encourage you to upgrade it to a safe version before re-enabling it."
How can this be fixed? 
This is a live website of a client and I can't afford to have anything not working there, I need this fixed urgently.
Please get back to me urgently.
Thnx
Itsik