… according to the BBC. So do the Vatican, political parties, and companies.
So what? Isn’t the whole point of Wikipedia that anyone can edit its entries? But they cannot do so completely anonymously, they can be traced through their IP addresses, which can often be linked to physical addresses. That is one of Wikipedia’s safeguards.
The only surprise here is that the CIA was so incompetent, or so deliberately open, as to do this editing through computers and IP addresses known to belong to it. It would have been rather easy for them to do this editing through proxy computers at anonymous residential or commercial locations.