jwt-attack SKILL.md skillA
jwt-attack from hellodqy/mastermind-bug-bounty is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add hellodqy/mastermind-bug-bounty/jwt-attack@git:20260709.c284c01Pins git:20260709.c284c01 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- hellodqy/mastermind-bug-bounty
- Path
skills/jwt_attack/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260709.c284c01, committed Jul 9, 2026
- First version recorded
- Jun 2, 2026
- Size
- 1,091 bytes
- Repository stars
- 14
- License
- none declared
Reason about JWT trust boundaries and whether token control can become privilege escalation.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# JWT Attack ## Goal 判断 JWT 是否能被伪造、篡改、替换或用于跨角色访问，并把成功结果回注到所有相关接口。 ## Tools / Inputs - JWT token、header/payload/signature、JS 关键字、泄露 secret、角色字段 - 资源索引：`references/INDEX.md`；候选资源：`jwt-analysis.md` ## Constraints 1. 不把“能解码 JWT”当漏洞。 2. 必须验证签名绕过、伪造或权限提升是否真实生效。 3. 成功拿到新身份后重测高价值接口。 4. 不爆破生产高风险目标；优先用已泄露或上下文词典。 5. 失败结果记录为认证边界证据。 ## Chain Questions - payload 里哪些字段控制身份、角色、租户或权限？ - secret 是否来自 JS、源码泄露或配置泄露？ - 伪造 token 能否访问管理、导出、配置或用户列表？ - 新 token 是否能扩大 value-pool linkage？
Read the whole file at its exact version.
How to install
mdr add hellodqy/mastermind-bug-bounty/jwt-attack@sha256:1cecd554566c44aaThe line at the top of this page pins the label git:20260709.c284c01, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_3yp6okryu2w6323t)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jun 2, 2026 and Jul 9, 2026, about one every 18 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260709.c284c01 latest | 2026-07-09 | c284c01 | 1,091 B | A | view · diff |
| git:20260709.a882698 | 2026-07-09 | a882698 | 1,057 B | A | view · diff |
| git:20260602.95e27a7 | 2026-06-02 | 95e27a7 | 16,128 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (1091 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
hellodqy/mastermind-bug-bounty · 14 stars · license none declared · pushed 2026-09-16 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_3yp6okryu2w6323t GET https://markdownregistry.com/api/v1/resolve?ref=hellodqy/mastermind-bug-bounty/jwt-attack GET https://markdownregistry.com/api/v1/blob/1cecd554566c44aaa8c555b71a1d2d076b51da642fc612c95a84357ca5b438f7
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.