CVE-2023-51300
📋 TL;DR
PHPJabbers Hotel Booking System v4.0 contains multiple cross-site scripting (XSS) vulnerabilities in various parameters that allow attackers to inject malicious scripts. When exploited, these vulnerabilities can lead to session hijacking, credential theft, or website defacement. Any organization using the vulnerable version of this hotel booking software is affected.
💻 Affected Systems
- PHPJabbers Hotel Booking System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, take over the booking system, access sensitive guest data (including payment information), and use the compromised system as a foothold for further attacks.
Likely Case
Attackers inject malicious scripts that steal user session cookies, redirect users to phishing sites, or deface the booking interface, potentially leading to data theft and reputational damage.
If Mitigated
With proper input validation and output encoding, the malicious scripts would be neutralized, preventing any successful exploitation while maintaining system functionality.
🎯 Exploit Status
Proof-of-concept exploit code is publicly available on Packet Storm, making exploitation straightforward for attackers with basic web security knowledge.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Check PHPJabbers website for security updates. 2. If patch is available, download and apply according to vendor instructions. 3. Test the fix thoroughly before deploying to production.
🔧 Temporary Workarounds
Input Validation and Output Encoding
allImplement server-side validation and proper output encoding for all user inputs, especially the vulnerable parameters.
Modify PHP code to use htmlspecialchars() or htmlentities() when outputting user data
Implement input validation filters for name, title, and SMS-related parameters
Web Application Firewall (WAF) Rules
allDeploy WAF rules to detect and block XSS payloads targeting the vulnerable parameters.
Configure WAF to block requests containing <script>, javascript:, and other XSS indicators in the affected parameters
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution sources
- Disable or restrict access to vulnerable components if not essential for business operations
🔍 How to Verify
Check if Vulnerable:
Test the vulnerable parameters by attempting to inject basic XSS payloads like <script>alert('XSS')</script> and checking if they execute.Check Version:
Check the system's admin panel or configuration files for version information (typically shows 'Version 4.0' in footer or about page)Verify Fix Applied:
Re-test with the same XSS payloads after implementing fixes to confirm they are properly sanitized and don't execute.📡 Detection & Monitoring
Log Indicators:
- Unusual POST/GET requests containing script tags or JavaScript code in name, title, or SMS parameters
- Multiple failed login attempts following suspicious parameter submissions
Network Indicators:
- HTTP requests with encoded script payloads in vulnerable parameters
- Outbound connections to suspicious domains from the booking system
SIEM Query:
source="web_server_logs" AND (uri_query="*<script>*" OR uri_query="*javascript:*") AND (uri_query="*name=*" OR uri_query="*title=*" OR uri_query="*plugin_sms_*=*")