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ljagiello/ctf-web

Fournit des techniques d'exploitation web pour les challenges CTF. À utiliser lorsque la cible est principalement une application HTTP, une API, un client navigateur, un moteur de template, un flux d'identité, ou une surface frontend/back-end de smart-contract, incluant XSS, SQLi, SSTI, SSRF, XXE, JWT, bypass d'authentification, upload de fichier, contrebande de requête, OAuth/OIDC, SAML, pollution de prototype et autres bugs web similaires. Ne pas l'utiliser pour la corruption de mémoire binaire native, le reverse engineering d'exécutables autonomes, la forensique de disque ou de mémoire, ou la cryptanalyse pure, à moins que la faille web ne reste la voie principale vers le flag.

Qu'est-ce que ctf-web ?

Ce skill, `ljagiello/ctf-web`, est un outil spécialisé pour les participants aux CTF (Capture The Flag) qui se concentre sur l'exploitation de vulnérabilités web. Il est conçu pour être utilisé lorsque la cible du défi est une application HTTP, une API, un client web, un moteur de templates, un système de gestion d'identité, ou même la surface frontend/back-end d'un smart-contract. Le skill couvre un large éventail de bugs web classiques et avancés, comme les attaques XSS, SQLi, SSTI, SSRF, XXE, les manipulations de JWT, les bypass d'authentification, l'upload de fichiers malveillants, la contrebande de requêtes HTTP, les protocoles OAuth/OIDC et SAML, ainsi que la pollution de prototypes. Il est important de noter que ce skill est dédié aux failles web ; il ne doit pas être utilisé pour des challenges de corruption mémoire binaire, de reverse engineering d'exécutables, de forensique système, ou de cryptanalyse pure, sauf si la composante web reste le vecteur d'attaque principal pour obtenir le flag.

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

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Documentation

Que fait ctf-web ?

Fournit des techniques d'exploitation web pour les challenges CTF. À utiliser lorsque la cible est principalement une application HTTP, une API, un client navigateur, un moteur de template, un flux d'identité, ou une surface frontend/back-end de smart-contract, incluant XSS, SQLi, SSTI, SSRF, XXE, JWT, bypass d'authentification, upload de fichier, contrebande de requête, OAuth/OIDC, SAML, pollution de prototype et autres bugs web similaires. Ne pas l'utiliser pour la corruption de mémoire binaire native, le reverse engineering d'exécutables autonomes, la forensique de disque ou de mémoire, ou la cryptanalyse pure, à moins que la faille web ne reste la voie principale vers le flag.

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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