All challenges
Code AnalysisIntermediate 60s

JWT introspection missing signature check

Auth middleware: claims = jwt.decode(token, options={"verify_signature": False}) if claims["exp"] > now(): allow() What is the vulnerability?

Think you can answer under pressure?

Get matched and answer live questions in 3-minute 1v1 battles. Elo ranking, badge tiers and bragging rights on the line.

Play this in a 3-minute battle