Our pen testers indicated that the outdated version of jQuery and YUI is used which have several vulnerabilities and those libraries should be upgraded. Are those libraries are patched by Alfresco? or Do you have any chance for security update for those libraries? Cheers
If we take a look into Release notes of 6.2 and 7.0 there's nothing related to YUI or JQuery but it's always recommended to be updated with Alfresco. There are numerous bugs solved between your version and latest 7.
In other hand, you can upgrade both libraries manually (this is always an option).