No, he pleaded guilty to making false statements, not to leaking Stuxnet. More specifically, he admitted to providing classified information to reporters in 2012, over a year after Stuxnet was identified.
Now, whether or not he was guilty of more than that, I don't think we know, but that's often the nature of plea deals.
Now, whether or not he was guilty of more than that, I don't think we know, but that's often the nature of plea deals.