Cybersecurity, learned like a practitioner.
24 learning paths · 398 modules live · every lesson written by someone who has shipped the control or run the engagement. Free to start.
Web Application Penetration Testing · modules
From HTTP fundamentals to business-logic exploitation. The complete path.
Module 29 · Advanced JWT Attacks — Beyond Algorithm Confusion
Beyond alg=none and HS256 confusion Module SC-4 covered the classic algorithm-confusion attacks. This module covers the advanced variants. KID header injection # JWT header { "alg": "HS256", "typ": "JWT", "kid": "../../../etc/passwd" } # Application uses kid to look up the signing key. # If kid is unchecked, attacker can: # - Path-traverse to read arbitrary […]
Module 15 · Insecure Deserialization
Java/.NET/Python/PHP/Ruby deserialization vulns, gadget chains, ysoserial, signed-data defense.
Module 16 · Race Conditions in Web Apps
TOCTOU, single-packet attacks, where races hide, Burp testing, transactional + idempotency-key defenses.
Module 17 · Prototype Pollution
JS prototype model, pollution sources, attack vectors (auth bypass, RCE chains), Object.create(null) defense.
Module 14 · HTTP Request Smuggling
CL.TE / TE.CL / TE.TE, HTTP/2 downgrade smuggling, exploitation impacts, detection via timing, defenses.
Practitioners who've
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