This is misinformation. Their policy was never to publish anything they could not verify, and the "asset for Russian intelligence" was only ever a DNC and US intelligence smear to discredit Wikileaks.
That Wikileaks systematically favors the russian government, and never does anything contrary to the interests of the russian government, strongly suggests they are an asset of russia.
You could claim Wikileaks is a Thai or South African asset too on those preconditions.