Your current jQuery version is undetermined

I have trouble with my site, which are more than 2x hacked and when I am testing it by using iThemes Security plugin, this say me that:

Replace jQuery With a Safe Version
Your current jQuery version is undetermined. Please check your homepage to see if you even need this feature
Note that this only checks the homepage of your site and only for users who are logged in. This is done intentionally to save resources. If you think this is in error click here to check again. This will open your homepage in a new window allowing the plugin to determine the version of jQuery actually being used. You can then come back here and reload this page to see your version.

How are a correct steps for diagnose this failure and for replacing with Safe Version ?

thanks boys

• This topic was modified 9 years, 7 months ago by Steven Stern (sterndata). Reason: moved from "hacks" to "troubleshooting"