Match and replace rules - Port Swigger
Summary: PortSwigger's Burp Suite documentation describes match and replace rules, which automatically substitute parts of HTTP and WebSocket messages as they pass through the proxy, configured under Proxy > Match and replace. Rules are listed in separate HTTP and WebSocket tables, execute in turn for each message, can be reordered with Up and Down buttons, and can be limited to in-scope items.
What's compelling: A proxy that rewrites headers, content, and authentication tokens in real time is a deliberate man-in-the-middle capability, and the option to apply rules only to in-scope items is the control that keeps that rewriting from touching traffic outside the engagement.
Read the original at PortSwigger Research ↗
- Topics
- Vulnerabilities & Patching
- Related
- Attackers Exploit UnrealIRCd Flaw That Enables Server-Level Command Injection Cyber Risks · Nov 14, 2026U.S. CISA adds Check Point and UnrealIRCd flaws to its Known Exploited Vulnerabilities catalog Cyber Risks · Nov 14, 2026PostgreSQL Patches 52 Flaws, Including 22-Year-Old Bug Enabling Authenticated RCE Cyber Risks · Nov 13, 2026