Tamper Data Better

Logs will show an inconsistent amount compared to what the UI allowed (e.g., HTML step attribute or min value).

| Limitation | Explanation | |------------|-------------| | | Needs browser trust in the proxy’s certificate (user must accept warning in Tamper Dev). Standalone proxies automate this with a local CA. | | No WebSocket support | Most browser extensions cannot intercept WebSocket frames. | | Performance overhead | Intercepting every request adds latency. | | Browser detection | Some modern apps detect MITM via certificate pinning or integrity checks. | | Limited scripting | Unlike Burp Intruder or ZAP Fuzzer, no built-in payload generation. |

After intercepting a request, an attacker can replay it hundreds of times to: tamper data

In summary, Tamper Data represents a category of tools that prioritize transparency in web communication. Whether you are a developer looking to fix a bug or a penetration tester hunting for exploits, understanding how to intercept and modify the data flowing from your browser is a critical part of understanding how the modern web functions.

| Attack Vector | Example Tampering | |---------------|-------------------| | | Change ?user_id=123 to ?user_id=1 (admin) | | Price manipulation | Modify hidden form field <input value="99.99"> to 0.01 | | SQL injection | Edit ?id=5 to ?id=5 OR 1=1 -- | | XSS | Change comment field to <script>alert(1)</script> | | Cookie hijacking | Manually set session token from another user | | Header injection | Add X-Forwarded-For: 127.0.0.1 | Logs will show an inconsistent amount compared to

https://example.com/transfer Goal: Change transfer amount from $100 to $0.01

is a popular browser extension used primarily for security testing, debugging, and web development. It allows users to intercept, view, and modify HTTP/HTTPS requests in real-time before they are sent to the server. Core Functionality | | No WebSocket support | Most browser

| Feature | Description | |---------|-------------| | | Stop outgoing requests on-the-fly | | Parameter Tampering | Edit GET/POST parameters, headers, cookies | | Replay | Resend modified requests repeatedly | | History | Log all requests for later analysis | | Pattern-based triggers | Auto-intercept based on URL or content |