CVE-2024-8002
📋 TL;DR
This vulnerability in VIWIS LMS allows attackers to inject malicious scripts through manipulated filename parameters during file uploads. It affects VIWIS LMS version 9.11 and enables cross-site scripting attacks that can compromise user sessions or redirect users to malicious sites. The vulnerability is remotely exploitable and requires upgrading to version 9.12 for remediation.
💻 Affected Systems
- VIWIS LMS
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, hijack user sessions, deface the application, or redirect users to phishing sites, potentially leading to complete system compromise.
Likely Case
Attackers inject malicious scripts that steal user session cookies or credentials, enabling account takeover and unauthorized access to the learning management system.
If Mitigated
With proper input validation and output encoding, the impact is limited to failed upload attempts with no script execution.
🎯 Exploit Status
The vulnerability requires file upload access, which typically requires authentication, but once authenticated, exploitation is straightforward through filename manipulation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 9.12
Vendor Advisory: https://vuldb.com/?ctiid.290767
Restart Required: Yes
Instructions:
1. Backup current configuration and data. 2. Download VIWIS LMS version 9.12 from official vendor sources. 3. Follow vendor upgrade documentation to install version 9.12. 4. Restart the application server. 5. Verify functionality and test file upload features.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side validation to sanitize filename parameters before processing uploads.
Implement regex pattern: ^[a-zA-Z0-9._-]+$ for filename validation
Strip or encode special characters (<, >, ", ', &, etc.) in filenames
Content Security Policy
allImplement CSP headers to restrict script execution from untrusted sources.
Add header: Content-Security-Policy: default-src 'self'; script-src 'self'
🧯 If You Can't Patch
- Disable file upload functionality in VIWIS LMS configuration
- Implement web application firewall (WAF) rules to block malicious filename patterns
🔍 How to Verify
Check if Vulnerable:
Check if VIWIS LMS version is 9.11 and test file upload with filename containing XSS payload like <script>alert('test')</script>.txtCheck Version:
Check VIWIS LMS admin panel or configuration files for version informationVerify Fix Applied:
After upgrading to version 9.12, test file upload with malicious filename patterns and verify scripts are not executed.📡 Detection & Monitoring
Log Indicators:
- File upload requests with suspicious filename patterns containing script tags or special characters
- Multiple failed upload attempts with unusual filenames
Network Indicators:
- HTTP POST requests to upload endpoints with encoded script payloads in filename parameters
SIEM Query:
source="web_logs" AND (uri_path="/upload" OR uri_path="*file*upload*") AND (filename="*<script>*" OR filename="*javascript:*" OR filename="*onerror=*" OR filename="*onload=*")