CVE-2025-8841
📋 TL;DR
This vulnerability allows remote attackers to upload arbitrary files to zlt2000 microservices-platform servers without proper restrictions. Affected systems are zlt2000 microservices-platform installations up to version 6.0.0. The vulnerability exists in the file upload function of the file-center component.
💻 Affected Systems
- zlt2000 microservices-platform
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution via malicious file upload leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Unauthorized file storage, potential for malware distribution, or denial of service through disk space exhaustion.
If Mitigated
Limited impact with proper file validation, but still potential for unauthorized file storage.
🎯 Exploit Status
Exploit details have been publicly disclosed in GitHub issues. Attack requires knowledge of the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.0.1 or later
Vendor Advisory: https://github.com/zlt2000/microservices-platform/issues/77
Restart Required: Yes
Instructions:
1. Update to version 6.0.1 or later. 2. Restart the microservices-platform application. 3. Verify the fix by testing file upload restrictions.
🔧 Temporary Workarounds
Implement file upload validation
allAdd server-side validation for file types, sizes, and names before processing uploads.
Implement file type whitelisting in FileController.java
Add size limits in application configuration
Disable file upload endpoint
allTemporarily disable the vulnerable upload endpoint if not required.
Comment out or remove @RequestMapping for upload methods in FileController.java
🧯 If You Can't Patch
- Implement web application firewall rules to block suspicious file upload patterns.
- Restrict network access to the file upload endpoint using network segmentation.
🔍 How to Verify
Check if Vulnerable:
Check if running zlt2000 microservices-platform version 6.0.0 or earlier. Attempt to upload a file with restricted extension to test validation.Check Version:
Check application.properties or pom.xml for version information, or use API endpoint if available.Verify Fix Applied:
After updating, attempt to upload restricted file types - should be rejected. Check that version is 6.0.1 or later.📡 Detection & Monitoring
Log Indicators:
- Unusual file upload patterns
- Uploads of executable files or scripts
- Large number of upload requests from single IP
Network Indicators:
- HTTP POST requests to /upload endpoints with suspicious file extensions
- Unusual traffic to file-center component
SIEM Query:
source="application.log" AND "FileController" AND "upload" AND ("exe" OR "php" OR "jsp" OR suspicious_extension)🔗 References
- https://github.com/zlt2000/microservices-platform/issues/77
- https://github.com/zlt2000/microservices-platform/issues/77#issue-3264841808
- https://vuldb.com/?ctiid.319375
- https://vuldb.com/?id.319375
- https://vuldb.com/?submit.623100
- https://github.com/zlt2000/microservices-platform/issues/77
- https://github.com/zlt2000/microservices-platform/issues/77#issue-3264841808
