Glossary term
What is deny by default? Meaning for developers
If no rule clearly allows a request, the answer is no. A route someone forgot to protect is then closed, not open.
Learn it properly · Security for DevelopersLesson 4: Access Control: IDOR, Roles and Mass AssignmentThe number one web risk: checking who you are but not what you may do. IDOR with a real example, deny by default, roles and ownership checks, and mass assignment.