The search operator inurl:id= is one of the most powerful and revealing queries you can use on search engines like Google, Bing, or DuckDuckGo. It finds every indexed web page that has the characters id= somewhere in its URL.
If a username is "johndoe123", search for: inurl:id=johndoe123 inurl id=
Here, id is the parameter, and 12345 is its value. The server uses this value to fetch specific data—usually a user profile, a product, an article, or a database record. For security researchers, inurl:id= is a goldmine for finding Insecure Direct Object References (IDOR) . IDOR occurs when an application uses an ID to access an object (like a file or database row) but fails to check if the user is authorized to see it. The search operator inurl:id= is one of the