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Many beginners think, "If Google found it, it must be public." Wrong. Google indexes URLs, not the authorization logic behind them. A private invoice link that Google found is still private data.
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.
| Query | What It Finds | | :--- | :--- | | inurl:id= intitle:profile | Profile pages with an ID parameter. | | inurl:id= ext:php | URLs ending in .php with an ID (often legacy, vulnerable scripts). | | inurl:id= site:reddit.com | All Reddit URLs that contain an ID (their post IDs). | | inurl:id= inurl:user | URLs containing both id and user (e.g., user?id=123 ). | | inurl:"id=" "delete" | Pages with delete functionality and an ID—proceed with extreme caution. | 1. Never access data you are not authorized to see. Just because a search engine found site.com/admin?id=1 does not mean you have permission to view it. Attempting to access it could be a computer crime (CFAA in the US, CMA in the UK, etc.). inurl id=
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.
https://example.com/profile?id=12345
inurl:id= intitle:profile "id=" -uuid -hex -"amp;"
If a username is "johndoe123", search for: inurl:id=johndoe123 Many beginners think, "If Google found it, it must be public
While this sounds simple, it is a direct window into how websites pass data. This write-up explains how to use it effectively and ethically. A URL containing id= almost always indicates a parameter being passed to a web application. For example:
Many beginners think, "If Google found it, it must be public." Wrong. Google indexes URLs, not the authorization logic behind them. A private invoice link that Google found is still private data.
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.
| Query | What It Finds | | :--- | :--- | | inurl:id= intitle:profile | Profile pages with an ID parameter. | | inurl:id= ext:php | URLs ending in .php with an ID (often legacy, vulnerable scripts). | | inurl:id= site:reddit.com | All Reddit URLs that contain an ID (their post IDs). | | inurl:id= inurl:user | URLs containing both id and user (e.g., user?id=123 ). | | inurl:"id=" "delete" | Pages with delete functionality and an ID—proceed with extreme caution. | 1. Never access data you are not authorized to see. Just because a search engine found site.com/admin?id=1 does not mean you have permission to view it. Attempting to access it could be a computer crime (CFAA in the US, CMA in the UK, etc.).
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.
https://example.com/profile?id=12345
inurl:id= intitle:profile "id=" -uuid -hex -"amp;"
If a username is "johndoe123", search for: inurl:id=johndoe123
While this sounds simple, it is a direct window into how websites pass data. This write-up explains how to use it effectively and ethically. A URL containing id= almost always indicates a parameter being passed to a web application. For example: