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Agent skill

Wooyun Legacy

by tanweai in tanweai/wooyun-legacy

WooYun business logic vulnerability methodology — 22,132 real cases across 6 domains (authentication bypass, authorization bypass, payment tampering, information disclosure, logic flaws…

Custom licenceAuto-check passedSecurity

Install Wooyun Legacy

skills CLI
$ npx skills add tanweai/wooyun-legacy --skill wooyun-legacy -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install tanweai/wooyun-legacy wooyun-legacy --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/tanweai/wooyun-legacy.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/wooyun-legacy/skills/wooyun-legacy .claude/skills/wooyun-legacy && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
wooyun-legacy
GitHub stars
1.8k
Token cost
~1.9k tokens
SKILL.md length
454 words
Files
7 (incl. references)
Skills in repo
1
Repo updated
First seen
Licence
Custom licence

At a glance

WooYun business logic vulnerability methodology — 22,132 real cases across 6 domains (authentication bypass, authorization bypass, payment tampering, information disclosure, logic flaws…

  • Works in 4 steps: 理解业务 → 映射用户旅程 → 识别状态转移 → …
  • ANY security testing
  • SKILL.md covers 漏洞严重性优先级, 四阶段方法, 真实案例 and 需要避免的思维陷阱, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Wooyun Legacy is an agent skill from tanweai/wooyun-legacy. WooYun business logic vulnerability methodology — 22,132 real cases across 6 domains (authentication bypass, authorization bypass, payment tampering, information disclosure, logic flaws, misconfiguration) and 33 vulnerability classes. Use for ANY security testing, auditing, or code review of web apps, APIs, or business systems — even without explicit "security" keywords. Triggers: penetration testing, security audit, vulnerability, bug bounty, payment security, IDOR, password reset, weak credentials, unauthorized…

Its SKILL.md is about 1.9k tokens, which your agent loads only when the skill is triggered. The skill folder holds 7 other files, including reference files (for example `references/authentication-domain.md`, `references/authorization-domain.md` and `references/configuration-domain.md`).

It sits in Security, covering Web application vulnerabilities, Debugging and Async programming. The repository describes itself as: wooyun-legacy skill for claude code.

When your agent uses it

  • ANY security testing
  • Code review of web apps
  • Business systems — even without explicit security keywords
  • Implicit intent: test this endpoint

Example prompts

  • “security”
  • “test this endpoint”
  • “find bugs”
  • “/wooyun-legacy”

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. 理解业务
  2. 映射用户旅程
  3. 识别状态转移
  4. 映射信任边界

What it can do on your machine

Read from SKILL.md and the folder at commit d6a69e1. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Wooyun Legacy loads about 1.9k tokens when it runs, and up to ~12k if it reads all its reference files. Until then it costs about 191 tokens; SKILL.md has 454 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~191
When it runs · the whole SKILL.md, loaded when a task matches
~1.9k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~12k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 454 words (~1,876 tokens).

“Extended trigger keywords (not in description due to length limits): Implicit black-box testing: "看看这个功能有没有问题"、"这个流程有漏洞吗"、"怎么绕过这个限制"、"订单/支付/退款流程测试"、"这个系统安全吗"、"接口有没有风险"、"check this API"、"is this flow secure"、"review this for issues". Tools & techniques: 抓包分析、Burp Suite、拦截请求、修改参数、重放攻击、并发测试、遍历ID、爆破、薅羊毛、刷单、套利、风控绕过、短信轰炸、接口滥用、未授权接口、任意文件、数据泄露、信息收集、子域名、目录扫描、指纹识别、intercept、replay、fuzz、enumerate、brute force、rate limiting bypass、coupon abuse.”

— opening of SKILL.md by tanweai, Custom licence
name
wooyun-legacy

Read the full SKILL.md on GitHub

Files

SKILL.md and 6 other files (references) in plugins/wooyun-legacy/skills/wooyun-legacy of tanweai/wooyun-legacy.

  • SKILL.md
  • references/authentication-domain.md
  • references/authorization-domain.md
  • references/configuration-domain.md
  • references/financial-domain.md
  • references/information-domain.md
  • references/logic-flow-domain.md

Open the folder on GitHubat commit d6a69e1

Compare with similar skills

Wooyun Legacy next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Wooyun Legacy compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Wooyun Legacy this skilltanweai/wooyun-legacy1.8k—~1.9kAutomated safety check: PassCustom licence
Code Audit3stoneBrother/code-audit8921 repos~2.7kAutomated safety check: PassNone
Strix Code Vulnerability Scanusestrix/strix68k—~1.1kAutomated safety check: PassApache-2.0
Client Request Signature Reversalawarexone/Agentic-Bug-Hunter5.3k—~4.7kAutomated safety check: PassMIT
Security Reviewgetsentry/skills1k4 repos~2.9kAutomated safety check: NotesCC-BY-SA-4.0
Performing Security Code Reviewjeremylongshore/tons-of-skills-marketplace2.8k2 repos~1.3kAutomated safety check: NotesMIT

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Categories

Questions about Wooyun Legacy

What does Wooyun Legacy do?

WooYun business logic vulnerability methodology — 22,132 real cases across 6 domains (authentication bypass, authorization bypass, payment tampering, information disclosure, logic flaws…. Wooyun Legacy is an agent skill from tanweai/wooyun-legacy. WooYun business logic vulnerability methodology — 22,132 real cases across 6 domains (authentication bypass, authorization bypass, payment tampering, information disclosure, logic flaws, misconfiguration) and 33 vulnerability classes.

When should I use Wooyun Legacy?

Wooyun Legacy fits situations like: ANY security testing; code review of web apps; business systems — even without explicit security keywords; implicit intent: test this endpoint.

How do I install Wooyun Legacy in Claude Code?

Run `npx skills add tanweai/wooyun-legacy --skill wooyun-legacy -a claude-code`. Or copy the skill folder (plugins/wooyun-legacy/skills/wooyun-legacy in tanweai/wooyun-legacy) into .claude/skills/wooyun-legacy in your project. Claude Code loads it when a task matches its description.

How do I install Wooyun Legacy in Codex?

Run `npx skills add tanweai/wooyun-legacy --skill wooyun-legacy -a codex`. Or copy the skill folder (plugins/wooyun-legacy/skills/wooyun-legacy in tanweai/wooyun-legacy) into .agents/skills/wooyun-legacy in your project. Codex loads it when a task matches its description.

Can I use Wooyun Legacy in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add tanweai/wooyun-legacy --skill wooyun-legacy -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/wooyun-legacy, .gemini/skills/wooyun-legacy, .github/skills/wooyun-legacy and .opencode/skills/wooyun-legacy in your project.

What does Wooyun Legacy need to run?

SKILL.md names no scripts, command-line tools or credentials: Wooyun Legacy is instructions for the agent only.

Does Wooyun Legacy access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Wooyun Legacy safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Wooyun Legacy use?

Wooyun Legacy has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Wooyun Legacy use?

About 1.9k tokens (SKILL.md is roughly 7.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 10k tokens, read only when the agent opens those files.

What are the alternatives to Wooyun Legacy?

Skills that share tags, products or a category with Wooyun Legacy: Code Audit (3stoneBrother/code-audit, 892 stars), Strix Code Vulnerability Scan (usestrix/strix, 68k stars), Client Request Signature Reversal (awarexone/Agentic-Bug-Hunter, 5.3k stars) and Security Review (getsentry/skills, 1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Wooyun Legacy?

tanweai (a GitHub user) maintains it in tanweai/wooyun-legacy, which has 1,780 GitHub stars. The repository was last updated on July 14, 2026.

Source: tanweai/wooyun-legacy on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.