Hunt Spa API

⚠️ AUTHORIZED USE ONLY This skill is for educational purposes or authorized security assessments only. You must have explicit, written permission from the system owner before using this tool. Misuse of this tool is illegal and strictly prohibited.

Mandatory confirmation gate Before running any command that probes, exploits, changes, persists on, extracts data from, or attempts credential access against a target:

1. Ask the user to state the exact target URL, IP, account, or resource.
2. Ask the user to confirm written authorization and the permitted scope.
3. Show the exact command(s) and explain their expected effect.
4. Wait for explicit confirmation in the current conversation.

Without that confirmation, remain read-only and provide defensive guidance only. Prefer a sandbox, disposable VM, or controlled lab.

When to use this skill

Trigger when:

• A target host returns a tiny HTML shell + big /static/js/*.js or /_next/static/* bundles (React/Vue/Angular/Next/Svelte SPA)
• You see a subdomain named console, app, dashboard, portal, admin, panel, manage, internal
• Recon surfaces any *api*, *-api*, api.* host
• A login page is OAuth/SSO-gated (the frontend auth tells you nothing about whether the API enforces auth)

The core insight: a SPA is a client to a backend API, and it ships the full map of that API — hosts, routes, sometimes keys — to anyone who views source. The login page being protected says nothing about whether the API behind it checks tokens. Auth is frequently enforced on the gateway/login and missing on a route group of the API.

DO NOT skip this because "the app needs login" — that's exactly when this pays off.

The play (5 steps)

1. Pull the shell + enumerate the bundles

curl -s https://console.target.com/ -o index.html
# React/CRA:
grep -oE '/static/js/[^"]+\.js' index.html
# Next.js:
grep -oE '/_next/static/[^"]+\.js' index.html
# generic:
grep -oiE 'src="[^"]+\.js[^"]*"' index.html

Download every bundle (they can be multi-MB — that's fine, it's all route data):

mkdir bundles
for j in $(grep -oE '/static/js/[^"]+\.js' index.html | sort -u); do
  curl -s "https://console.target.com$j" -o "bundles/$(echo "$j"|tr '/' '_')"
done

2. Harvest API hosts, routes, and secrets from the bundles

B=bundles/*.js
# Backend API hosts (incl. dev/beta/staging variants — often weaker auth)
grep -ohiE 'https://[a-z0-9.-]*(api|console|backend|service)[a-z0-9.-]*\.target\.com[a-z0-9/_-]*' $B | sort -u
# Versioned API base paths
grep -ohiE '/api/v[0-9]+/?' $B | sort -u
# Route literals — minified bundles store routes as STRING segments, not full URLs.
# Grep for quoted "resource/action" strings:
grep -ohiE '"[a-z0-9_-]+/[a-z0-9_/-]+"' $B | tr -d '"' \
  | grep -iE '(login|user|account|order|billing|invoice|payment|deal|report|token|otp|password|reset|admin|profile|auth|upload|export|role|permission|dashboard|wallet|finance|sales)' | sort -u
# Secrets (validate before trusting — most AIza keys are Maps/analytics, not Auth)
grep -ohiE '(AIza[0-9A-Za-z_-]{35}|AKIA[0-9A-Z]{16}|sk_live_[0-9A-Za-z]+|eyJ[A-Za-z0-9_-]{10,}\.[A-Za-z0-9_-]{10,}|apiKey["'"'"']?\s*[:=]\s*["'"'"'][^"'"'"']+)' $B | sort -u

Note: minifiers store routes as concatenated string segments (e.g. "account/payment/list"), NOT full /api/v2/... URLs — so a naive /api/v* grep returns nothing. Grep for the resource-word route strings and prepend the base yourself.

Lazy-loaded (async) chunks — don't stop at HTML-referenced bundles. CRA/webpack SPAs reference only runtime+main+vendor in index.html; numbered async route chunks are named inside main.js's chunk map and loaded at runtime, so grepping only /static/js/*.js from the shell truncates route coverage to eager chunks.

grep -oE '[0-9]+:"[a-f0-9]+"' bundles/*main*.js        # {chunkId:"hash"} pairs
# reconstruct /static/js/<id>.<hash>.chunk.js, download each, re-run route/host/secret harvest
# asset-manifest.json (if present) lists them all -> hunt-source-leak

3. Establish a CONTROL — find an endpoint that IS gated

Before declaring anything vulnerable, send an unauthenticated request to an endpoint you expect to be protected, and capture what correct rejection looks like:

curl -s -X POST https://api.target.com/api/users -H 'Content-Type: application/json' -d '{}'
# secure → {"error":"Missing or invalid authorization header"} or HTTP 401

This is your differential. A sibling API (e.g. a second API host, or a different route group on the same host) is the ideal control — same stack, so a different response = real authz gap, not a quirk.

4. Test each route family UNAUTHENTICATED, both methods

For every discovered route, send it with no Authorization header and compare to the control:

for r in <routes>; do
  curl -s -o /tmp/r -w "[%{http_code}] $r\n" -X POST -H 'Content-Type: application/json' -d '{}' "https://api.target.com/api/v2/$r"
done

Interpret:

• 401/"Missing authorization" → gated (correct). Move on.
• 200 with data → unauthenticated data exposure. Finding.
• 400 "field X is mandatory" → the route processed your request and reached business-logic validation without an auth check → auth bypass; supply the field minimally to confirm.
• 200 + verbose DB/stack error (e.g. PROCEDURE db_x.sp_y does not exist) → reached the data layer unauthenticated; also a SQLi-surface signal.
• Mandatory fields named like is_admin / is_internal / requested_by / role_id / account_type → authorization derived from client-supplied parameters — set the privilege flag and you self-elevate. Critical-class.

5. Pivot & prove (minimally)

• IDs returned by one endpoint (account_id, order_id, deal_id) are the keys the other endpoints consume — they prove the whole router is reachable, not just one route.
• Test dev-/beta-/staging- API variants — they frequently have weaker/disabled auth.
• Check the response headers: Access-Control-Allow-Origin: * compounds the issue (any web origin reads it from a victim's browser).
• STOP at minimum-necessary proof. A handful of records (or a totalCount) confirms the missing check. Do NOT enumerate the table — see redteam-mindset data-minimization boundary. The finding is the absent auth, not the data volume.