From ArsTechnica:

Clark agreed that any Android-based password manager that uses the OS clipboard is susceptible. He strongly recommends that people stop using any app setup that works this way. Many apps use standalone browsers, browser extensions, or software keyboards to enter credentials into login fields. There is no evidence they are susceptible to sniffing. The reason ClipCaster takes special aim at LastPass, Clark said, is simple. It just happened to be the manager he installed on his phone. There are no reports that password managers running on iOS or Windows Phone are vulnerable. But there can be way to know for sure, since Ars is unaware of the any comprehensive study testing the security of managers on those platforms.