Both bamboo and hardwood flooring can be ruined by moisture from standing water or water vapor. Bamboo is commonly touted as being slightly more moisture-resistant and mold-resistant, but the differences are negligible and essentially meaningless. If you fail to properly finish either type of flooring, it will discolor with both moisture and sunlight exposure, and will be highly vulnerable to stains.
If the environment is damp enough to support mold growth, both hardwood and bamboo are susceptible if they are unfinished. This is why neither hardwood nor bamboo is recommended for below-grade applications, such as basements.