CVE-2020-23037
📋 TL;DR
This vulnerability allows attackers to inject and execute arbitrary web scripts or HTML code through a crafted POST request targeting the filename parameter in Portable Ltd Playable v9.18. Attackers can compromise affected systems to steal data, deface websites, or launch further attacks. Organizations using this specific version of Portable Ltd Playable are affected.
💻 Affected Systems
- Portable Ltd Playable
📦 What is this software?
Playable by Portable
Playable by Portable
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary code, steal sensitive data, install malware, and pivot to other systems in the network.
Likely Case
Website defacement, data theft, session hijacking, and installation of web shells for persistent access.
If Mitigated
Limited impact with proper input validation, output encoding, and web application firewalls blocking malicious payloads.
🎯 Exploit Status
The vulnerability requires only a crafted POST request to the filename parameter, making it easy to exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Check vendor website for security updates. 2. If patch exists, download and apply according to vendor instructions. 3. Verify the fix by testing the vulnerable parameter.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation on the filename parameter to reject malicious payloads.
Web Application Firewall Rules
allDeploy WAF rules to block requests containing script tags, JavaScript, or HTML injection patterns.
🧯 If You Can't Patch
- Isolate the vulnerable system from the internet and restrict network access.
- Implement strict monitoring and alerting for suspicious POST requests to the filename parameter.
🔍 How to Verify
Check if Vulnerable:
Test the filename parameter with script injection payloads like <script>alert('test')</script> and observe if it executes.Check Version:
Check the software version through its admin interface or configuration files.Verify Fix Applied:
Retest with the same injection payloads after applying mitigations to ensure they are blocked or sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to the filename parameter containing script tags or JavaScript code
- Multiple failed injection attempts
Network Indicators:
- HTTP POST requests with suspicious payloads in the filename parameter
- Traffic patterns indicating exploitation attempts
SIEM Query:
source="web_logs" AND method="POST" AND uri="*filename*" AND (content="<script>" OR content="javascript:")