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For developers, the existence of data tampering tools highlights a golden rule of web security: tamper data chrome
This method allows you to replay modified requests, but it is difficult to intercept a request before it leaves the browser during a natural navigation flow (e.g., clicking a submit button) using only native tools. Step 3: Create a new rule -> Modify Request
Install Requestly from the Chrome Web Store. Step 2: Pin the extension and open the dashboard. Step 3: Create a new rule -> Modify Request . Step 4: Source: URL Contains https://example.com/api/login . Step 5: Modification: Select Request Body . Step 6: Change the value. - Original: "username":"john","password":"12345" - Tampered: "username":"john","password":"' OR '1'='1" Step 7: Save the rule (Enable the rule). Step 8: Return to Chrome and click "Login." Step 9: Check the Network tab. You will see the tampered payload was sent. Check the server's response (if it returns a database error, you found a SQL injection flaw). Step 6: Change the value