Sample Burp Suite extension: custom editor tab

Summary: PortSwigger published a sample Burp Suite extension that uses the tool's new extensibility API to add custom tabs to Burp's HTTP message editor, letting testers display and edit data formats Burp does not natively support. The sample handles an artificially simple format - Base64-encoded data inside a request parameter - and ships with Java and Python source, a compiled Java JAR, and an ASP.NET page implementing the format on client and server.
What you should know: The extension replaces the older practice of hooking into Burp's HTTP stack to unpack and repack serialized data, an approach PortSwigger describes as restricted in the data it can handle and as tampering with the integrity of HTTP messages.

Read the original at PortSwigger Research ↗

Topics: Vulnerabilities & Patching
Related: Attackers Exploit UnrealIRCd Flaw That Enables Server-Level Command Injection Cyber Risks · Nov 14, 2026
U.S. CISA adds Check Point and UnrealIRCd flaws to its Known Exploited Vulnerabilities catalog Cyber Risks · Nov 14, 2026
PostgreSQL Patches 52 Flaws, Including 22-Year-Old Bug Enabling Authenticated RCE Cyber Risks · Nov 13, 2026