cross-site scripting vulnerability


I just got this email from SiteLock ------->

"We have detected a critical cross-site scripting vulnerability at your site This must be corrected within 72 hours in order to maintain your certification. Please see your SiteLock dashboard for more details. From your dashboard, you can also take advantage of our Expert Services team to help you correct this issue."

Here is a picture of dashboard from SiteLock-->

This issues related to search page or search result !!!

How can I fix it ? Please help!