Teams often use headers like this to toggle . If a feature isn't ready for the public, developers can enable it for themselves by including the header in their requests, allowing for real-world testing without impacting the general user base. 4. API Mocking and Sandbox Environments
An attacker can use tools like Burp Suite, Postman, or the browser's Developer Network Panel to modify the HTTP request 1.2.5 . By adding X-Dev-Access: yes to the headers of a /login request, they gain access to protected resources without valid credentials 1.2.2. Why "Temporary" Backdoors are Dangerous x-dev-access yes