Individual skill
hunt-account-abuse
Hunt non-ATO account-abuse vulnerabilities — logic flaws in authentication/account endpoints that cause harm without taking over another account. Covers: per-email account-lockout DoS (rate-limit keyed on victim email instead of IP), HTTP-method anomalies on auth routes (DELETE/PUT on /login returning success), password-reset fragility and error-handling leaks, and the missing-header/CORS triage that turns these from noise into rated findings. Use when testing login/register/forgot-password/MFA endpoints, reviewing auth flow resilience, or rating auth-logic bugs that are NOT full account takeover. Complements hunt-ato (which covers takeover paths only).
skills/security/hunt-account-abuse/SKILL.md
Source commit 961a0dd3d2d2f66a07a416ade3b1d4473b64802e
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- Matches the observed repository HEAD
- Yes
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- Observed behavior
- Network or broad shell
- Last checked
- Nov 10, 2026
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- Repository stars (not skill ratings)
- 1,014
- Repository last updated
- Nov 5, 2026
- License
- Apache-2.0
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- ai-agent Repository topic
- appsec Repository topic
- bug-bounty Repository topic
- cybersecurity Repository topic
- devsecops Repository topic
- exploit-validation Repository topic
- hermes-agent Repository topic
- infosec Repository topic
- llm-security Repository topic
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- security Derived category
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# Hunt — Non-ATO Account Abuse
Account abuse is broader than ATO. These primitives damage availability, integrity, or leak via auth logic but do NOT require taking over a second account — so they are rated on their own severity, not the ATO gate. All recipes below were executed against a live Next.js/Vercel target and verified.
## When this applies
- You are probing `/api/auth/*`, `/login`, `/register`, `/forgot-password`, `/reset`, `/mfa/*`.
- Rate-limit / lockout behavior observed on login.
- `OPTIONS` reveals unexpected allowed methods.
- Reset/forgot-password returns inconsistent or 5xx errors.
## Primitive A — Per-Email Account-Lockout DoS (High when lock is per-victim-email)
A failed-login rate-limit that counts per **target email** (not per source IP/session) is an offensive weapon: an unauthenticated attacker locks any user out by sending N bad logins for that user's email.
Detection recipe: