CVE-2024-33306
📋 TL;DR
CVE-2024-33306 is a stored cross-site scripting (XSS) vulnerability in SourceCodester Laboratory Management System 1.0 that allows attackers to inject malicious scripts via the 'First Name' parameter during user creation. This affects all users of the vulnerable software version, potentially compromising user sessions and enabling further attacks.
💻 Affected Systems
- SourceCodester Laboratory Management System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, hijack user sessions, deface the application, or redirect users to malicious sites, potentially leading to complete system compromise.
Likely Case
Attackers inject malicious scripts that steal session cookies or credentials from users who view the compromised user profile pages.
If Mitigated
With proper input validation and output encoding, the malicious scripts would be rendered harmless as text rather than executable code.
🎯 Exploit Status
Exploitation requires user creation privileges, but the vulnerability is straightforward to exploit once authenticated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Implement input validation and output encoding as described in workarounds.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement server-side validation to reject or sanitize HTML/JavaScript in the First Name field
Modify create_user.php to add: htmlspecialchars($_POST['first_name'], ENT_QUOTES, 'UTF-8')
Content Security Policy
allImplement CSP headers to restrict script execution
Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Or add to PHP: header("Content-Security-Policy: default-src 'self'; script-src 'self'");
🧯 If You Can't Patch
- Restrict user creation privileges to trusted administrators only
- Implement a web application firewall (WAF) with XSS protection rules
🔍 How to Verify
Check if Vulnerable:
Create a user with First Name containing: <script>alert('XSS')</script> and check if script executes when viewing the user profileCheck Version:
Check system version in admin panel or footer, or examine source code files for version markersVerify Fix Applied:
Attempt the same XSS payload after implementing fixes - it should display as plain text rather than executing📡 Detection & Monitoring
Log Indicators:
- Unusual user creation events
- First name fields containing script tags or JavaScript code
- Multiple failed XSS attempts in logs
Network Indicators:
- HTTP requests with script tags in POST parameters
- Unusual outbound connections from user profile pages
SIEM Query:
source="web_logs" AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=") AND uri="*create_user*"