Driven by a Liu process, backward uncertain differential equation is a type of differential equations with given final value. So far, the concepts of stability in measure, stability in mean and stability in pth moment for backward uncertain differential equations have been proposed. As a supplement, this paper is concerned with two other kinds of stability of backward uncertain differential equations, and proposes the concepts of almost sure stability and pth moment exponential stability. In addition, some sufficient conditions for backward uncertain differential equations being stable almost surely or pth moment exponentially are derived.