As you guys might know that now a days WordPress is getting hacked frequently. There are number of reasons why these things happening and one the main reason is to have old jQuery version on the site.
So if your site has the old jQuery version there is strong chances to getting hacked easily. You should always be updated.
To fix the jQuery related issues there is a plugin called “jQuery Updater“
This plugin updates jQuery to the latest official stable version, which is most likely not available within the latest stable release of WordPress.