Agent skill · Security

ctf-web

Provides web exploitation techniques for CTF challenges. Use when the target is primarily an HTTP application, API, browser client, template engine, identity flow, or smart-contract frontend/backend surface, including XSS, SQLi, SSTI, SSRF, XXE, JWT, auth bypass, file upload, request smuggling, OAuth/OIDC, SAML, prototype pollution, and similar web bugs. Do not use it for native binary memory corruption, reverse engineering of standalone executables, disk or memory forensics, or pure cryptanalysis unless the web flaw is still the main path to the flag.

ljagiellogithub.com/ljagielloGitHub ↗
claude-codecodexcan modify filesMIT
Install
npx skills add ljagiello/ctf-skills --skill ctf-web --agent claude-code

Same command for any agent — swap --agent for codex, cursor, copilot.

Facts
Files in the skill folder: 21
SKILL.md size: 10 KB
Bundled scripts: none
Allowed tools: BashReadWriteEditGlobGrepTaskWebFetchWebSearch
Requires: Requires filesystem-based agent (Claude Code or similar) with bash, Python 3, and internet access for tool installation.
Path: ctf-web/SKILL.md
Open the folder on GitHub →
Where it comes from
Stars: 2,919
Language: Python
Read our review of the source →

Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.

From the SKILL.md

# CTF Web Exploitation Use this skill as a routing and execution guide for web-heavy challenges. Keep the first pass short: map the app, confirm the trust boundary, and only then dive into the detailed technique notes. ## Prerequisites **Python packages (all platforms):** ```bash pip install sqlmap flask-unsign requests ``` **Linux (apt):** ```bash apt install hashcat jq curl ``` **macOS (Homebrew

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About this skill
What does the ctf-web skill do?

Provides web exploitation techniques for CTF challenges. Use when the target is primarily an HTTP application, API, browser client, template engine, identity flow, or smart-contract frontend/backend surface, including XSS, SQLi, SSTI, SSRF, XXE, JWT, auth bypass, file upload, request smuggling, OAuth/OIDC, SAML, prototype pollution, and similar web bugs. Do not use it for native binary memory corruption, reverse engineering of standalone executables, disk or memory forensics, or pure cryptanalysis unless the web flaw is still the main path to the flag.

How do I install it?

Run `npx skills add ljagiello/ctf-skills --skill ctf-web --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.

Where does this skill come from?

From ljagiello/ctf-skills, a repository with 2,919 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.

Is a popular skill a good skill?

Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.

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