The days of friends passing around their Disney Plus passwords to watch shows and movies available on Disney Plus appear to be coming to an end. Disney CEO Bob Iger told CNBC in an interview that the company plans to launch its "first serious foray into password sharing" in June.

Disney already has password-sharing rules in place, effective January 25 for new subscribers and March 14 for existing members. The rules make it difficult for users to access their accounts from multiple locations, which is a deterrent but not a perfect solution.

The password-sharing clampdown will initially roll out in "a few markets in a few countries." Iger did not say which countries or markets would receive the new password sharing option, but said it would be in place for all subscribers by September.

Once the new changes begin, Disney is expected to allow members to add users outside their household for an additional fee, but did not say how much that would be; Netflix charges an additional $7.99 for adding viewers outside the main user's household. I expect Disney to stay in the same range to remain competitive. Disney may even try to undercut Netflix, but we will have to wait until the new plan is in place to find out for sure.

This comes shortly after Disney Plus and Hulu were combined into one app. It's clear that Disney Plus wants to make money from its streaming service, and combining content from the two services into one is a great way to do that. Getting more users to pay for their accounts is also a method that has worked for Netflix and could work for Disney.

Either way, we know that Disney Plus will join other streamers who are cracking down on password sharing. We don't know exactly how much it will cost or how it will work, but we do know it is coming.