CVE-2024-40069
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into the Online ID Generator System 1.0 through user input fields. When exploited, these scripts are stored and executed when other users view affected pages. Anyone using the vulnerable version of this software is affected.
💻 Affected Systems
- Sourcecodester Online ID Generator System
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, redirect users to malicious sites, deface the application, or perform actions on behalf of authenticated users.
Likely Case
Attackers inject malicious scripts that execute when administrators or other users view user management pages, potentially stealing credentials or session data.
If Mitigated
With proper input validation and output encoding, the malicious scripts would be neutralized before execution.
🎯 Exploit Status
Exploitation requires access to user creation/editing functionality. The vulnerability is in the save function of the Users.php controller.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None known
Restart Required: No
Instructions:
No official patch available. Implement input validation and output encoding as workarounds.
🔧 Temporary Workarounds
Input Validation and Sanitization
allAdd server-side validation to sanitize firstname and lastname parameters before processing
Modify id_generator/classes/Users.php to add: htmlspecialchars($_POST['firstname'], ENT_QUOTES, 'UTF-8') and similar for lastname
Content Security Policy
allImplement CSP headers to restrict script execution
Add header: Content-Security-Policy: default-src 'self'; script-src 'self'
🧯 If You Can't Patch
- Implement a web application firewall (WAF) with XSS protection rules
- Disable or restrict access to the vulnerable endpoint (/id_generator/classes/Users.php?f=save)
🔍 How to Verify
Check if Vulnerable:
Test by submitting <script>alert('XSS')</script> in firstname or lastname fields during user creation/updateCheck Version:
Check application version in documentation or configuration filesVerify Fix Applied:
Verify that script tags are properly encoded when displayed (appear as text, not executed)📡 Detection & Monitoring
Log Indicators:
- POST requests to /id_generator/classes/Users.php?f=save with script tags in parameters
- Unusual user agent strings or input patterns
Network Indicators:
- HTTP requests containing script tags in POST body parameters
SIEM Query:
source="web_logs" AND uri="/id_generator/classes/Users.php" AND (param="firstname" OR param="lastname") AND value MATCHES "<script>"