JQuery.com web servers were compromised and serving the RIG exploit kit for a short period of time on the afternoon of September 18th. An internal investigation has not yet found evidence that there was in fact a compromise. The only potential system compromised is the web software or server that runs jquery.com. We have asked RiskIQ to help us look through our server logs and systems to help identify when and how a compromise happened. Please check this blog post for updates on the situation.”]
Source: https://blog.jquery.com/2014/09/23/was-jquery-com-compromised/