// Attempt to read data from exposed tables to verify actual data exposure and RLS effectiveness.
Orchestrate a complete Supabase security audit with guided step-by-step execution and ownership confirmation.
Test Row Level Security (RLS) policies for common bypass vulnerabilities and misconfigurations.
List and test exposed PostgreSQL RPC functions for security issues and potential RLS bypass.
List all tables exposed via the Supabase PostgREST API to identify the attack surface.
Analyze Supabase authentication configuration for security weaknesses and misconfigurations.
Test if user signup is open and identify potential abuse vectors in the registration process.
| name | supabase-audit-tables-read |
| description | Attempt to read data from exposed tables to verify actual data exposure and RLS effectiveness. |
š“ CRITICAL: PROGRESSIVE FILE UPDATES REQUIRED
You MUST write to context files AS YOU GO, not just at the end.
- Write to
.sb-pentest-context.jsonIMMEDIATELY after each table tested- Log to
.sb-pentest-audit.logBEFORE and AFTER each test- DO NOT wait until the skill completes to update files
- If the skill crashes or is interrupted, all prior findings must already be saved
This is not optional. Failure to write progressively is a critical error.
This skill attempts to read data from exposed tables to determine what information is actually accessible.
supabase-audit-tables-list if needed)The skill performs SELECT queries on each exposed table:
GET https://[project].supabase.co/rest/v1/[table]?select=*&limit=5
Authorization: Bearer [anon-key]
Important: This is READ-ONLY. No data is modified or deleted.
| Mode | Description | Queries |
|---|---|---|
| Quick | First 5 rows from each table | ?limit=5 |
| Sample | Random sample across tables | ?limit=10&order=random |
| Count | Just row counts, no data | HEAD request |
Test read access on exposed tables
Count accessible rows in all tables (no data retrieval)
Test read access on the users table
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DATA ACCESS TEST RESULTS
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Test Mode: Quick (5 rows per table)
Tables Tested: 8
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Results by Table
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1. users
Status: š“ P0 - DATA EXPOSED
Rows Retrieved: 5 (of 1,247 total)
Sample Data:
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ā id: 550e8400-e29b-41d4-a716-446655440001 ā
ā email: john.doe@example.com ā PII EXPOSED ā
ā name: John Doe ā PII EXPOSED ā
ā avatar_url: https://... ā
ā created_at: 2025-01-15T10:30:00Z ā
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Finding: User emails and names accessible without auth
2. profiles
Status: š P1 - PARTIAL ACCESS
Rows Retrieved: 5
Note: Only public fields returned (RLS working partially)
Columns Visible: id, bio, website
Columns Blocked: user_id, social_links, private_notes
3. posts
Status: ā
EXPECTED ACCESS
Rows Retrieved: 5
Note: Only published=true posts returned (RLS working)
Data: Public content, appropriate access level
4. orders
Status: ā
BLOCKED
Response: 403 Forbidden
Message: "new row violates row-level security policy"
Note: RLS properly blocking access
5. api_keys
Status: ā
BLOCKED
Response: 403 Forbidden
Note: RLS properly protecting secrets
6. products
Status: ā
EXPECTED ACCESS
Rows Retrieved: 5
Note: Public catalog data, appropriate access
7. comments
Status: š P1 - MORE DATA THAN EXPECTED
Rows Retrieved: 5
Issue: user_id column exposed (can correlate to users)
Recommendation: Use a view to hide user_id
8. settings
Status: š“ P0 - SENSITIVE DATA EXPOSED
Rows Retrieved: 3
Sample Data:
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ā key: stripe_webhook_secret ā
ā value: whsec_xxxxxxxxxxxx ā SECRET EXPOSED ā
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Finding: Application secrets in accessible table!
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Summary
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P0 (Critical): 2 tables with sensitive data exposed
P1 (High): 2 tables with partial/unexpected exposure
Blocked: 2 tables properly protected
Expected: 2 tables with appropriate public access
Total Rows Accessible: 1,892 across exposed tables
Immediate Actions:
1. Fix 'settings' table - remove from public or add RLS
2. Fix 'users' table - add RLS to protect email/name
3. Review 'comments' to hide user correlation
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| Status | Severity | Criteria |
|---|---|---|
| š“ DATA EXPOSED | P0 | Sensitive data (PII, secrets, financial) accessible |
| š PARTIAL ACCESS | P1 | More data than expected, but not critical |
| š” UNEXPECTED | P2 | Accessible but low-risk data |
| ā BLOCKED | - | RLS properly preventing access |
| ā EXPECTED | - | Public data, appropriate access |
The skill identifies sensitive data types:
| Type | Patterns | Severity if Exposed |
|---|---|---|
| PII | email, phone, name, address | P0 |
| Financial | amount, total, card, payment | P0 |
| Secrets | key, secret, token, password | P0 |
| Auth | user_id, session, jwt | P1 |
| Metadata | created_at, updated_at | P2 |
{
"data_access": {
"timestamp": "2025-01-31T10:30:00Z",
"tables_tested": 8,
"summary": {
"p0_exposed": 2,
"p1_partial": 2,
"blocked": 2,
"expected": 2
},
"results": [
{
"table": "users",
"status": "exposed",
"severity": "P0",
"rows_accessible": 1247,
"sensitive_columns": ["email", "name"],
"sample_redacted": true
},
{
"table": "settings",
"status": "exposed",
"severity": "P0",
"rows_accessible": 3,
"sensitive_data_types": ["secrets"],
"finding": "Application secrets exposed"
}
],
"total_rows_accessible": 1892
}
}
[2025-01-31T10:30:00Z] READ_TEST_START tables=8
[2025-01-31T10:30:01Z] READ_TEST table=users status=200 rows=5 severity=P0
[2025-01-31T10:30:01Z] READ_TEST table=orders status=403 severity=none
[2025-01-31T10:30:02Z] READ_TEST_COMPLETE exposed=4 blocked=2
-- Enable RLS
ALTER TABLE users ENABLE ROW LEVEL SECURITY;
-- Only authenticated users see their own data
CREATE POLICY "Users see own data"
ON users FOR SELECT
USING (auth.uid() = id);
-- Or create a public view with limited columns
CREATE VIEW public.users_public AS
SELECT id, avatar_url, created_at FROM users;
-- Remove from public access entirely
REVOKE ALL ON TABLE settings FROM anon, authenticated;
-- Access only via Edge Functions
-- In your Edge Function:
const { data } = await supabaseAdmin
.from('settings')
.select('*')
.eq('key', 'stripe_webhook_secret')
.single()
-- RLS for published content only
CREATE POLICY "Public sees published posts"
ON posts FOR SELECT
USING (published = true);
-- Authors see their own drafts
CREATE POLICY "Authors see own posts"
ON posts FOR SELECT
USING (auth.uid() = author_id);
ā Problem: All tables return 403 ā Solution: RLS may be too restrictive or anon key invalid. This is actually good from a security standpoint.
ā Problem: Empty results but no error ā Solution: RLS is filtering all rows. Table structure is exposed but no data.
ā Problem: Timeout on large tables ā Solution: Use count mode or reduce limit.
ā ļø This skill MUST update tracking files PROGRESSIVELY during execution, NOT just at the end.
DO NOT batch all writes at the end. Instead:
.sb-pentest-audit.log.sb-pentest-context.json with results.sb-pentest-audit.logThis ensures that if the skill is interrupted, crashes, or times out, all findings up to that point are preserved.
Update .sb-pentest-context.json with results:
{
"data_access": {
"timestamp": "...",
"tables_tested": 8,
"summary": { "p0_exposed": 2, ... },
"results": [ ... ],
"total_rows_accessible": 1892
}
}
Log to .sb-pentest-audit.log:
[TIMESTAMP] [supabase-audit-tables-read] [START] Testing data access
[TIMESTAMP] [supabase-audit-tables-read] [FINDING] P0: users table exposed
[TIMESTAMP] [supabase-audit-tables-read] [CONTEXT_UPDATED] .sb-pentest-context.json updated
If files don't exist, create them before writing.
FAILURE TO UPDATE CONTEXT FILES IS NOT ACCEPTABLE.
š Evidence Directory: .sb-pentest-evidence/03-api-audit/data-samples/
| File | Content |
|---|---|
data-samples/[table]-sample.json | Sample data from each accessible table |
data-samples/[table]-blocked.json | Proof of blocked access (403 response) |
{
"evidence_id": "API-READ-001",
"timestamp": "2025-01-31T10:20:00Z",
"category": "api-audit",
"type": "data_access",
"severity": "P0",
"finding_id": "P0-002",
"table": "users",
"request": {
"method": "GET",
"url": "https://abc123def.supabase.co/rest/v1/users?select=*&limit=5",
"headers": {
"apikey": "[REDACTED]",
"Authorization": "Bearer [REDACTED]"
},
"curl_command": "curl -s 'https://abc123def.supabase.co/rest/v1/users?select=*&limit=5' -H 'apikey: $ANON_KEY' -H 'Authorization: Bearer $ANON_KEY'"
},
"response": {
"status": 200,
"headers": {
"content-range": "0-4/1247"
},
"total_rows": 1247,
"sample_data": [
{
"id": "550e8400-e29b-41d4-...",
"email": "[REDACTED]@example.com",
"name": "[REDACTED]",
"created_at": "2025-01-15T10:30:00Z"
}
],
"data_redacted": true
},
"analysis": {
"severity": "P0",
"pii_exposed": ["email", "name"],
"total_records_accessible": 1247,
"authentication_required": false
}
}
{
"evidence_id": "API-READ-002",
"timestamp": "2025-01-31T10:21:00Z",
"table": "orders",
"severity": null,
"response": {
"status": 403,
"body": {"message": "new row violates row-level security policy"}
},
"analysis": {
"rls_working": true,
"access_blocked": true
}
}
# === DATA ACCESS TESTS ===
# Test: Users table access
curl -s "$SUPABASE_URL/rest/v1/users?select=*&limit=5" \
-H "apikey: $ANON_KEY" \
-H "Authorization: Bearer $ANON_KEY"
# Test: Orders table access (should be blocked)
curl -s "$SUPABASE_URL/rest/v1/orders?select=*&limit=5" \
-H "apikey: $ANON_KEY" \
-H "Authorization: Bearer $ANON_KEY"
supabase-audit-tables-list ā List tables firstsupabase-audit-rls ā Deep dive into RLS policiessupabase-report ā Generate full report