# Api Authorization And Bola

> >-

- **Type:** Skill
- **Install:** `agentstack add skill-yaklang-hack-skills-api-authorization-and-bola`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [yaklang](https://agentstack.voostack.com/s/yaklang)
- **Installs:** 0
- **Category:** [Agent Skills](https://agentstack.voostack.com/c/agent-skills)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [yaklang](https://github.com/yaklang)
- **Source:** https://github.com/yaklang/hack-skills/tree/main/skills/api-authorization-and-bola

## Install

```sh
agentstack add skill-yaklang-hack-skills-api-authorization-and-bola
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# SKILL: API Authorization and BOLA — Object Access, Function Access, and Mass Assignment

> **AI LOAD INSTRUCTION**: Use this skill when an API exposes object IDs, nested resources, or role-sensitive functions and you need a focused authorization test path: BOLA, BFLA, method abuse, and hidden field control.

## 1. CORE TEST LOOP

1. Create Account A and Account B.
2. As Account A, capture create, read, update, and delete flows.
3. Replay with Account B's token.
4. Test sibling endpoints, nested endpoints, and alternate HTTP verbs.

## 2. TEST SURFACES

| Surface | Example |
|---|---|
| object read | `/api/v1/orders/123` |
| nested object | `/api/v1/users/1/invoices/9` |
| admin or internal function | `/api/v1/admin/users` |
| update path | `PUT`, `PATCH`, `DELETE` variants |
| hidden JSON fields | `role`, `org`, `verified`, `tier` |

## 3. QUICK PAYLOADS

```json
{"role":"admin"}
{"isAdmin":true}
{"org":"target-company"}
{"verified":true}
```

## 4. WHAT TESTERS MISS

- object IDs in headers, cookies, GraphQL args, and nested objects
- alternate methods sharing the same route but weaker authz
- parent check present, child resource check missing
- admin docs revealing extra writable fields

## 5. NEXT ROUTING

- For JWT or token-layer abuse: [api auth and jwt abuse](../api-auth-and-jwt-abuse/SKILL.md)
- For GraphQL and hidden parameter discovery: [graphql and hidden parameters](../graphql-and-hidden-parameters/SKILL.md)
- For broader IDOR patterns outside APIs: [idor broken object authorization](../idor-broken-object-authorization/SKILL.md)

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [yaklang](https://github.com/yaklang)
- **Source:** [yaklang/hack-skills](https://github.com/yaklang/hack-skills)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-yaklang-hack-skills-api-authorization-and-bola
- Seller: https://agentstack.voostack.com/s/yaklang
- Browse the marketplace: https://agentstack.voostack.com/browse

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Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.