When hunting broken access control issues, try this: 1. First use EVERY exposed GUI function available 2. Look for API docs and extract URLs 3. Look for URLs in code 4. Look for URLs in search engines
5. Look for URLs in Wayback Engine 6. Use word lists to fuzz known API paths for additional end points 7. Create two lists of all known object IDs for two different accounts 8. Logged in as account 1, try to access the object IDs of account 2 in all URLs where IDs are used