CVE-2025-8729
📋 TL;DR
This is a critical path traversal vulnerability in MigoXLab LMeterX 1.2.0 that allows attackers to access arbitrary files on the server by manipulating the task_id parameter in the upload service. The vulnerability affects all systems running the vulnerable version and can be exploited remotely without authentication.
💻 Affected Systems
- MigoXLab LMeterX
📦 What is this software?
Lmeterx by Migoxlab
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through reading sensitive files like configuration files, SSH keys, or database credentials, potentially leading to data exfiltration or further system exploitation.
Likely Case
Unauthorized access to sensitive files containing application configuration, user data, or system information that could be used for further attacks.
If Mitigated
Limited impact with proper file system permissions and network segmentation restricting access to critical system files.
🎯 Exploit Status
The exploit has been publicly disclosed and appears to be straightforward to execute based on the vulnerability description.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patched in commit f1b00597e293d09452aabd4fa57f3185207350e8
Vendor Advisory: https://github.com/MigoXLab/LMeterX/commit/f1b00597e293d09452aabd4fa57f3185207350e8
Restart Required: No
Instructions:
1. Pull the latest code from the repository. 2. Apply commit f1b00597e293d09452aabd4fa57f3185207350e8. 3. Verify the fix by checking that the process_cert_files function properly validates task_id input.
🔧 Temporary Workarounds
Disable upload service
allTemporarily disable the vulnerable upload service component to prevent exploitation
systemctl stop lmeterx-upload
Disable the upload endpoint in configuration
Input validation at proxy level
allImplement WAF rules or reverse proxy filtering to block path traversal patterns in task_id parameter
Add WAF rule: deny requests with '../' in task_id parameter
🧯 If You Can't Patch
- Implement strict file system permissions to limit what files the application can access
- Deploy network segmentation to isolate vulnerable systems from sensitive data
🔍 How to Verify
Check if Vulnerable:
Check if running LMeterX version 1.2.0 and examine if the process_cert_files function in backend/service/upload_service.py lacks proper input validation for task_id parameter.Check Version:
Check application version in configuration or run: python -c "import lmeterx; print(lmeterx.__version__)"Verify Fix Applied:
Verify that commit f1b00597e293d09452aabd4fa57f3185207350e8 is applied and test that path traversal attempts via task_id parameter are properly rejected.📡 Detection & Monitoring
Log Indicators:
- Multiple failed file access attempts with unusual task_id values
- Requests containing '../' patterns in task_id parameter
- Access to files outside expected upload directories
Network Indicators:
- Unusual file paths in HTTP requests to upload endpoints
- Requests attempting to access known sensitive file paths
SIEM Query:
source="lmeterx.logs" AND (task_id="*../*" OR uri="*/upload*" AND response_code=500)🔗 References
- https://github.com/MigoXLab/LMeterX/commit/f1b00597e293d09452aabd4fa57f3185207350e8
- https://github.com/MigoXLab/LMeterX/issues/10
- https://github.com/MigoXLab/LMeterX/issues/10#issue-3255375024
- https://github.com/MigoXLab/LMeterX/issues/10#issuecomment-3136380379
- https://vuldb.com/?ctiid.319225
- https://vuldb.com/?id.319225
- https://vuldb.com/?submit.621741
- https://github.com/MigoXLab/LMeterX/issues/10
