authentication
Authentication security testing - auth bypass, JWT attacks, OAuth flaws, password attacks, 2FA bypass, CAPTCHA bypass, and bot detection evasion.
Skill by LeoWSY-hashblue
Chalk Labs
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Install
Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.
npx agentmarket install skill/leowsy-hashblue-authentication
Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.
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About
Use cases: testing, security
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What's inside
- Skill name
authentication- Description
- Authentication security testing - auth bypass, JWT attacks, OAuth flaws, password attacks, 2FA bypass, CAPTCHA bypass, and bot detection evasion.
- License
- MIT
- Instructions
- 53 lines in SKILL.md · view on GitHub
Before installing
- Ships executable scripts
Files (65)
- SKILL.md
- BOT_DETECTION.md · reference/
- CAPTCHA_BYPASS.md · reference/
- INDEX.md · reference/
- PASSWORD_CREDENTIAL_MANAGEMENT.md · reference/
- adfs-exploitation.md · reference/
- authentication-cheat-sheet.md · reference/
- authentication-index.md · reference/
- authentication-principles.md · reference/
- authentication-quickstart.md · reference/
- authentication-resources.md · reference/
- default-credentials.md · reference/
- jwt-advanced.md · reference/
- jwt-quickstart.md · reference/
- jwt_security_resources.md · reference/
- ntlm-http-listener.py · reference/
- oauth-index.md · reference/
- oauth-quickstart.md · reference/
- oauth-resources.md · reference/
- backup-codes.md · reference/scenarios/2fa/
- brute-force-otp.md · reference/scenarios/2fa/
- code-reuse.md · reference/scenarios/2fa/
- direct-endpoint-access.md · reference/scenarios/2fa/
- email-sms-extraction.md · reference/scenarios/2fa/
- otp-leakage.md · reference/scenarios/2fa/
- otp-parameter-manipulation.md · reference/scenarios/2fa/
- predictable-codes.md · reference/scenarios/2fa/
- race-condition.md · reference/scenarios/2fa/
- response-manipulation.md · reference/scenarios/2fa/
- session-pre-2fa.md · reference/scenarios/2fa/
- alg-confusion.md · reference/scenarios/jwt/
- claim-tampering.md · reference/scenarios/jwt/
- jku-injection.md · reference/scenarios/jwt/
- jwe-nested-token.md · reference/scenarios/jwt/
- jwk-injection.md · reference/scenarios/jwt/
- kid-path-traversal.md · reference/scenarios/jwt/
- none-algorithm.md · reference/scenarios/jwt/
- psychic-signatures-cve-2022-21449.md · reference/scenarios/jwt/
- signature-stripping.md · reference/scenarios/jwt/
- weak-secret-crack.md · reference/scenarios/jwt/
- x5u-x5c-injection.md · reference/scenarios/jwt/
- code-theft-postmessage.md · reference/scenarios/oauth/
- csrf-state.md · reference/scenarios/oauth/
- implicit-flow-attacks.md · reference/scenarios/oauth/
- parameter-manipulation.md · reference/scenarios/oauth/
- pkce-downgrade.md · reference/scenarios/oauth/
- redirect-uri-manipulation.md · reference/scenarios/oauth/
- scope-escalation.md · reference/scenarios/oauth/
- ssrf-client-registration.md · reference/scenarios/oauth/
- credential-dumping.md · reference/scenarios/password-attacks/
- credential-stuffing.md · reference/scenarios/password-attacks/
- db-hash-lateral-movement.md · reference/scenarios/password-attacks/
- dictionary-attack.md · reference/scenarios/password-attacks/
- encrypted-container-cracking.md · reference/scenarios/password-attacks/
- hash-cracking.md · reference/scenarios/password-attacks/
- keylogging.md · reference/scenarios/password-attacks/
- lazagne-browser-dpapi.md · reference/scenarios/password-attacks/
- online-brute-force.md · reference/scenarios/password-attacks/
- pass-the-hash.md · reference/scenarios/password-attacks/
- password-spraying.md · reference/scenarios/password-attacks/
- …and 5 more
SKILL.md (first lines)
# Authentication Test authentication mechanisms including login security, token handling, 2FA, CAPTCHA, and bot detection. ## Techniques | Type | Key Vectors | |------|-------------| | **Auth Bypass** | Default credentials, logic flaws, response manipulation | | **ADFS/SAML** | Golden SAML, token signing cert theft, assertion manipulation, SAML wrapping | | **JWT** | Algorithm confusion, key injection, claim tampering, token forging | | **OAuth** | Redirect manipulation, CSRF, token leakage, scope abuse | | **Password** | Brute force, credential stuffing, password policy bypass | | **2FA Bypass** | Response manipulation, direct endpoint access, code reuse, race conditions | | **CAPTCHA Bypass** | Missing server validation, token reuse, OCR, parameter manipulation | | **Bot Detection** | Behavioral biometrics simulation, fingerprint randomization, stealth mode | ## Tools **PasswordGenerator** (`tools/password_generator.py`): ```python from tools.password_generator import generate_password password = generate_password(hint_text="8-16 chars, uppercase, numbers") ``` **CredentialManager** (`tools/credential_manager.py`): ```python from tools.credential_manager import CredentialManager mgr = CredentialManager() mgr.store_credential(target="example.com", username="test", password="pass") ``` ## Workflow 1. Analyze auth implementation (forms, tokens, 2FA, CAPTCHA) 2. Test bypass vectors per technique type 3. Use Playwright MCP with human-like behavior (typing 80-200ms, random pauses) 4. Capture evidence (screenshots, network logs, tokens) 5. Document findings with PoC scripts ## Reference - `reference/authentication*.md` - Auth bypass techniques, payloads, and resources - `reference/jwt*.md` - JWT attack techniques and cheat sheets - `reference/oauth*.md` - OAuth vulnerability testing - `reference/password-attacks.md` - Password attack vectors - `reference/adfs-exploitation.md` - ADFS, Golden SAML, federation attacks - `reference/2FA_BYPASS.md` - 10 2FA bypass methods - `reference/CAPTCHA_BYPASS.md` - 11 CAPTCHA bypass techniques - `reference/BOT_DETECTION.md` - Bot detection evasion strategies - `reference/PASSWORD_CREDENTIAL_MANAGEMENT.md` - Tool usage guide
From LeoWSY-hashblue/-communitytools-custom, MIT.
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Signals
- Stars
- 3
- Forks
- 1
- Open issues
- 0
- Last commit (this folder)
- May 26, 2026 (5 months ago)
From GitHub (fetched Oct 24, 2026).
Details
- License
- MIT
- First seen
- Oct 24, 2026
- Last checked
- Oct 24, 2026
- Source
- GitHubgithub-graphql
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authentication skill. Agent Mart. https://agentmart.dev/skills/leowsy-hashblue-authentication (last updated 2026-10-24)