CVE-2025-55816
📋 TL;DR
HotelDruid v3.0.7 and earlier contains a cross-site scripting (XSS) vulnerability in the /modifica_app.php file. This allows attackers to inject malicious scripts that execute in users' browsers when visiting the vulnerable page. HotelDruid administrators and users accessing the application are affected.
💻 Affected Systems
- HotelDruid
📦 What is this software?
Hoteldruid by Digitaldruid
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator session cookies, perform actions as authenticated users, redirect to malicious sites, or install malware on client systems.
Likely Case
Session hijacking leading to unauthorized access to the hotel management system, potentially compromising guest data and reservation systems.
If Mitigated
With proper input validation and output encoding, the impact is limited to minor UI disruption without data compromise.
🎯 Exploit Status
Exploitation requires user interaction with crafted malicious links or forms targeting the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.hoteldruid.com/en/
Restart Required: No
Instructions:
1. Check vendor website for security updates. 2. If patch available, download and apply according to vendor instructions. 3. Test functionality after patching.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side input validation to sanitize user input before processing.
Modify /modifica_app.php to add input sanitization functions
Web Application Firewall
allDeploy WAF with XSS protection rules to block malicious payloads.
🧯 If You Can't Patch
- Restrict access to HotelDruid interface using network segmentation and firewall rules
- Implement Content Security Policy (CSP) headers to mitigate script execution
🔍 How to Verify
Check if Vulnerable:
Test /modifica_app.php endpoint with XSS payloads like <script>alert('XSS')</script> and check if script executes.Check Version:
Check HotelDruid version in admin interface or configuration filesVerify Fix Applied:
Retest with same XSS payloads after applying fixes to confirm scripts no longer execute.📡 Detection & Monitoring
Log Indicators:
- Unusual POST/GET requests to /modifica_app.php with script tags or JavaScript code
- Multiple failed login attempts followed by XSS payloads
Network Indicators:
- HTTP requests containing <script> tags or JavaScript functions in URL parameters
SIEM Query:
source="web_logs" AND (url="*modifica_app.php*" AND (content="*<script>*" OR content="*javascript:*"))