CVE-2026-3171
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts via the firstname/lastname parameters in the /queue.php file of the Patients Waiting Area Queue Management System. The cross-site scripting (XSS) attack can be executed remotely, potentially affecting any user who views the manipulated queue data. Organizations using version 1.0 of this specific software are vulnerable.
💻 Affected Systems
- SourceCodester/Patrick Mvuma Patients Waiting Area Queue Management System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, redirect users to malicious sites, perform actions on behalf of authenticated users, or deploy malware to visitors' browsers.
Likely Case
Attackers inject malicious scripts that steal user session data or redirect users to phishing sites when they view the queue management interface.
If Mitigated
With proper input validation and output encoding, the malicious scripts would be neutralized before reaching users' browsers.
🎯 Exploit Status
The exploit has been published and requires minimal technical skill to execute. Attackers can exploit this remotely without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Consider implementing input validation and output encoding as workarounds, or replace the software with a secure alternative.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side validation to sanitize firstname and lastname parameters before processing
Modify /queue.php to include: $firstname = htmlspecialchars($_POST['firstname'], ENT_QUOTES, 'UTF-8');
$lastname = htmlspecialchars($_POST['lastname'], ENT_QUOTES, 'UTF-8');
Web Application Firewall (WAF) Rules
allConfigure WAF to block XSS payloads in firstname/lastname parameters
Add WAF rule to block patterns like: <script>, javascript:, onload=, etc.
🧯 If You Can't Patch
- Isolate the vulnerable system behind a reverse proxy with strict input filtering
- Disable or restrict access to the /queue.php endpoint if not essential
🔍 How to Verify
Check if Vulnerable:
Test by submitting a payload like <script>alert('XSS')</script> in the firstname or lastname fields and check if it executes in the browserCheck Version:
Check the software version in the admin panel or configuration filesVerify Fix Applied:
After implementing fixes, test with the same XSS payloads to ensure they are properly sanitized and don't execute📡 Detection & Monitoring
Log Indicators:
- Unusual characters in firstname/lastname parameters in web server logs
- Multiple requests with script tags or JavaScript code in parameters
Network Indicators:
- HTTP POST requests to /queue.php containing script tags or JavaScript in parameters
SIEM Query:
source="web_server" AND uri="/queue.php" AND (param="firstname" OR param="lastname") AND (content="<script>" OR content="javascript:" OR content="onload=")