trapdoor
/ˈtræpˈdɔː(r)/noun
1- a hinged or removable panel in a floor, ceiling, or roof活板门, 地板门, 活动天窗。
1.1
- a feature or defect of a computer system which allows surreptitious unauthorized access to data belonging to other users（计算机系统中的）陷阱门, 天窗。