JWT Scanner
Summary: PortSwigger lists JWT Scanner, a Burp Suite extension by Dario Caluzi, Cyrill Bannwart and Tobias Hort-Giess, at version 2.1.0, last updated 29 May 2025, for automated testing of JSON Web Token implementations in web applications. The extension runs during an active scan or on a manually selected request to detect JWTs and check them, including forging public keys.
What you should know: JWT flaws like forged public keys are testable by a free extension running inside Burp, so the gap between your token implementation and an attacker's check is one scan away.
Read the original at PortSwigger Research ↗
- Topics
- Vulnerabilities & Patching
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