CVE-2024-33976
📋 TL;DR
This is a Cross-Site Scripting (XSS) vulnerability in E-Negosyo System version 1.0 that allows attackers to inject malicious JavaScript via the 'id' parameter in the admin user management page. When exploited, it enables partial browser session takeover of authenticated users. Organizations running E-Negosyo System 1.0 are affected.
💻 Affected Systems
- E-Negosyo System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete account compromise leading to administrative privilege escalation, data theft, or further system compromise through session hijacking.
Likely Case
Session hijacking allowing unauthorized access to admin functions, potential data exfiltration, and lateral movement within the application.
If Mitigated
Limited impact with proper input validation, output encoding, and Content Security Policy (CSP) headers in place.
🎯 Exploit Status
Exploitation requires authenticated admin access but uses simple XSS payloads via URL parameter manipulation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-janobe-products
Restart Required: No
Instructions:
No official patch available. Implement input validation and output encoding in /admin/user/index.php for the 'id' parameter.
🔧 Temporary Workarounds
Input Validation Filter
allAdd server-side validation to ensure 'id' parameter contains only expected characters (numbers)
Modify /admin/user/index.php to validate $_GET['id'] with preg_match('/^\d+$/', $_GET['id'])
Output Encoding
allApply proper HTML encoding when outputting user-controlled data
Use htmlspecialchars() or equivalent when echoing $_GET['id'] parameter
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) rules to block XSS payloads in URL parameters
- Restrict admin access to trusted IP addresses only and implement strong session management
🔍 How to Verify
Check if Vulnerable:
Test by accessing /admin/user/index.php?id=<script>alert('XSS')</script> as authenticated admin userCheck Version:
Check application version in admin panel or configuration filesVerify Fix Applied:
Verify the same payload no longer executes JavaScript and returns sanitized output📡 Detection & Monitoring
Log Indicators:
- Unusual GET requests to /admin/user/index.php with script tags or JavaScript in id parameter
- Multiple failed admin login attempts followed by successful access
Network Indicators:
- HTTP requests containing <script> tags in URL parameters
- Unusual outbound connections from admin interface
SIEM Query:
source="web_logs" AND uri="/admin/user/index.php" AND (id="*<script>*" OR id="*javascript:*")