TryHackMe | IDOR | Walkthrough

Learn how to find and exploit IDOR vulnerabilities in a web application giving you access to data that you shouldn't have. *As always, I recommend to read through every task to get a complete understanding of each room. Happy learning!* ♾️TIMESTAMP ♾️ 0:45 Task 1 - What is an IDOR? 1:12 Task 2 - An IDOR Example 2:19 Task 3 - Finding IDORs in Encoded IDs 2:43 Task 4 - Finding IDORs in Hashed IDs 3:05 Task 5 - Finding IDORs in Unpredictable IDs 3:23 Task 6 - Where are IDORs located 3:43 Task 7 - A Practical IDOR Example IDOR stands for Insecure Direct Object Reference. It is a security vulnerability that occurs when an application's authorization and access controls are insufficiently enforced, allowing an attacker to manipulate parameters or input values in order to access unauthorized resources or perform actions on behalf of other users. In an IDOR attack, the attacker typically identifies a direct object reference (such as a database record, file, or resource) and modifies the identifier or input value associated with it to gain unauthorized access. This can lead to various malicious activities, including viewing sensitive information, modifying data, or performing actions reserved for privileged users. To mitigate IDOR vulnerabilities, developers should implement proper access controls and validate user input on the server-side. Access should be based on the authenticated user's identity and authorization level, rather than relying solely on client-side controls. Additionally, input validation and sanitization techniques should be employed to prevent manipulation of parameters or identifiers.