Permission management QA testing exists to prevent that. It is the checkpoint between code and chaos. In any system with roles, groups, and granular access levels, a bad permission rule can expose data, block critical functions, or create security holes. Testing permissions means proving that every user can do only what they are supposed to do — nothing more, nothing less.
The process starts with mapping every permission state in the system. Document roles, privileges, and inheritance rules. Identify sensitive actions: data export, deletion, admin panel access. Each must be paired with the exact set of user identities authorized for it. A solid permission matrix is the blueprint for both development and QA.
Next comes automated coverage. Write tests that simulate login, session creation, and endpoint calls under multiple accounts. Validate HTTP responses, status codes, and visible UI elements against the matrix. A denied action should return consistent errors — no bypass through API quirks or hidden routes.