Media people are quite trick in this aspect. Sometimes they will say it's a Unconfirmed Source which I think is Total BS.
Sometimes they will say Confidential Source which I think is Code for I know something is wrong there but I don't have the Proof of it so I will put The CI tag on this News.
Lastly it's the Confidential Source inside the Target in this case I tend to believe a part of the Story as they are openly saying that they have a CI inside which seems kind of legit.
Judging these things can be pretty complicated - sometimes a journalist could be telling the truth, sometimes not, and either way your decision is based on how much you trust them. How to asses that though?
What's uncomfortable for people is that most of the time we should just be saying "I don't really know if this news is true or not", and then apply something like ockham's razor as well as looking for flaws in the logic of the story.
At the end of the Day, you need to use your own Brains and Judge the fact.
Either its true or not.