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ljagiello/ctf-web

Proporciona técnicas de explotación web para desafíos CTF. Úsalo cuando el objetivo sea principalmente una aplicación HTTP, API, cliente de navegador, motor de plantillas, flujo de identidad o superficie frontend/backend de contratos inteligentes.

¿Qué es ctf-web?

Este skill, ljagiello/ctf-web, es una herramienta especializada para la explotación de vulnerabilidades web en el contexto de desafíos Capture The Flag (CTF). Proporciona técnicas para atacar aplicaciones HTTP, APIs, clientes de navegador, motores de plantillas y flujos de identidad. Cubre un amplio espectro de vulnerabilidades comunes, incluyendo XSS, SQLi, SSTI, SSRF, XXE, JWT, bypass de autenticación, subida de archivos maliciosos, contrabando de peticiones (request smuggling), OAuth/OIDC, SAML, polución de prototipos y otros bugs web similares. El skill es útil para desarrolladores y entusiastas de la seguridad que participan en CTFs, ya que les permite identificar y explotar rápidamente las debilidades de las aplicaciones web. Funciona integrando estas técnicas en el flujo de trabajo del agente de IA, guiándolo para que priorice el ataque a la superficie web del objetivo. No debe usarse para corrupción de memoria binaria nativa, ingeniería inversa de ejecutables independientes, análisis forense de disco o memoria, o criptoanálisis puro, a menos que la falla web siga siendo la ruta principal para obtener la bandera.

Compatible con~Claude Code~Codex CLI~Cursor
npx skills add https://github.com/ljagiello/ctf-skills/tree/main/skills/ctf-web

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Documentación

¿Qué hace ctf-web?

Proporciona técnicas de explotación web para desafíos CTF. Úsalo cuando el objetivo sea principalmente una aplicación HTTP, API, cliente de navegador, motor de plantillas, flujo de identidad o superficie frontend/backend de contratos inteligentes, incluyendo XSS, SQLi, SSTI, SSRF, XXE, JWT, bypass de autenticación, subida de archivos, contrabando de peticiones, OAuth/OIDC, SAML, polución de prototipos y otros bugs web similares. No lo uses para corrupción de memoria binaria nativa, ingeniería inversa de ejecutables independientes, análisis forense de disco o memoria, o criptoanálisis puro, a menos que la falla web siga siendo la ruta principal para la bandera.

Individual skills in this repo

This repo contains 10 individual skills — each has its own dedicated page.

ljagiello/ctf-ai-ml

Provides AI and machine learning techniques for CTF challenges. Use when attacking ML models, crafting adversarial examples, performing model extraction, prompt injection, membership inference, training data poisoning, fine-tuning manipulation, neural network analysis, LoRA adapter exploitation, LLM jailbreaking, or solving AI-related puzzles.

ljagiello/ctf-crypto

Provides cryptography attack techniques for CTF challenges. Use when attacking encryption, hashing, signatures, ZKP, PRNG, or mathematical crypto problems involving RSA, AES, ECC, lattices, LWE, CVP, number theory, Coppersmith, Pollard, Wiener, padding oracle, GCM, key derivation, or stream/block cipher weaknesses.

ljagiello/ctf-forensics

Provides digital forensics and signal analysis techniques for CTF challenges. Use when analyzing disk images, memory dumps, event logs, network captures, cryptocurrency transactions, steganography, PDF analysis, Windows registry, Volatility, PCAP, Docker images, coredumps, side-channel power traces, DTMF audio spectrograms, packet timing analysis, CD audio disc images, or recovering deleted files and credentials.

ljagiello/ctf-malware

Provides malware analysis and network traffic techniques for CTF challenges. Use when analyzing obfuscated scripts, malicious packages, custom crypto protocols, C2 traffic, PE/.NET binaries, RC4/AES encrypted communications, YARA rules, shellcode analysis, memory forensics for malware (Volatility malfind, process injection detection), anti-analysis techniques (VM/sandbox detection, timing evasion, API hashing, process injection, environment checks), or extracting malware configurations and indicators of compromise.

ljagiello/ctf-misc

Provides miscellaneous CTF challenge techniques for problems that do not cleanly fit the main categories. Use for encoding puzzles, pyjails, bash jails, RF/SDR, DNS oddities, unicode tricks, esoteric languages, QR or audio puzzles, constraint solving, game theory, unusual sandbox escapes, and hybrid logic puzzles. Prefer a more specific skill first when the challenge is mainly web, pwn, reverse, forensics, malware, OSINT, or crypto. Treat this as the fallback skill for genuine cross-category or edge-case challenges, not the default starting point.

ljagiello/ctf-osint

Provides open source intelligence techniques for CTF challenges. Use when gathering information from public sources, social media, geolocation, DNS records, username enumeration, reverse image search, Google dorking, Wayback Machine, Tor relays, FEC filings, or identifying unknown data like hashes and coordinates.

ljagiello/ctf-pwn

Provides binary exploitation techniques for CTF challenges. Use when you already have a vulnerable native target or service and need to turn memory corruption or low-level primitives into code execution or privilege escalation, such as buffer overflows, format strings, heap bugs, ROP, ret2libc, shellcode, kernel exploitation, seccomp bypass, sandbox escape, or Windows/Linux exploit chains. Do not use it when the main blocker is understanding what the binary does; use reverse engineering first. Do not use it for pure web bugs, disk or packet forensics, or standalone crypto/math challenges.

ljagiello/ctf-reverse

Provides reverse engineering techniques for CTF challenges. Use when the main job is to understand how a compiled, obfuscated, packed, or virtualized target works before exploiting or solving it, including binaries, APKs, WASM, firmware, custom VMs, bytecode, game clients, malware-like loaders, and anti-debug or anti-analysis logic. Do not use it when the vulnerability is already understood and the remaining task is exploitation; use pwn instead. Do not use it for pure web workflows, log or disk forensics, or standalone crypto problems unless reversing the implementation is the real blocker.

ljagiello/ctf-writeup

Generates a single standardized submission-style CTF writeup for competition handoff and organizer review. Use after solving a CTF challenge to document the solution steps, tools used, and lessons learned in a structured format.

ljagiello/solve-challenge

Solves CTF challenges by performing first-pass triage, identifying the dominant category, and routing execution to the right specialized ctf-* skill. Use when the user gives you a challenge bundle, a remote service, a suspicious file, or only a vague challenge description and you must determine where to start. Do not use it when the category is already clear and a specialized skill can be invoked directly; this is the dispatcher and recon entrypoint, not the deepest reference for category-specific techniques.

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