CVE-2024-40473
📋 TL;DR
A stored cross-site scripting (XSS) vulnerability in the Best House Rental Management System v1.0 allows attackers to inject malicious scripts into house number and description fields. When other users view these entries, the scripts execute in their browsers, potentially stealing session cookies or performing unauthorized actions. This affects all users of the vulnerable system version.
💻 Affected Systems
- SourceCodester Best House Rental Management System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator session cookies, gain full system control, deface the application, or redirect users to malicious sites, potentially leading to complete system compromise and data theft.
Likely Case
Attackers will steal user session cookies to hijack accounts, perform unauthorized actions, or deface house listing pages with malicious content.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized, preventing execution while maintaining application functionality.
🎯 Exploit Status
Exploitation requires access to house management functionality. Public proof-of-concept demonstrates the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Download the latest version from SourceCodester if available
2. Replace the vulnerable manage_houses.php file
3. Implement input validation and output encoding in all user input fields
🔧 Temporary Workarounds
Input Validation and Sanitization
allAdd server-side validation to sanitize House_no and Description parameters before storage
// PHP example: htmlspecialchars($input, ENT_QUOTES, 'UTF-8')
// PHP example: filter_var($input, FILTER_SANITIZE_STRING)
Content Security Policy
allImplement CSP headers to restrict script execution sources
Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
// Add to .htaccess or web server configuration
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads in House_no and Description parameters
- Disable or restrict access to manage_houses.php functionality to trusted users only
🔍 How to Verify
Check if Vulnerable:
Test by entering <script>alert('XSS')</script> in House_no or Description fields and check if script executes when viewing the entryCheck Version:
Check system version in admin panel or review source code comments for version informationVerify Fix Applied:
Attempt the same XSS payload and verify it's properly sanitized (shows as plain text rather than executing)📡 Detection & Monitoring
Log Indicators:
- Unusual length or special characters in House_no/Description parameters
- Multiple failed validation attempts on house management forms
Network Indicators:
- POST requests to manage_houses.php containing script tags or JavaScript code
SIEM Query:
source="web_server_logs" AND (uri="*manage_houses.php*" AND (param="*<script>*" OR param="*javascript:*"))