CVE-2025-61189
📋 TL;DR
Jeecgboot versions 3.8.2 and earlier contain a path traversal vulnerability in the /sys/comment/addFile endpoint that allows attackers to upload files with whitelisted extensions to the system's /opt directory instead of the intended /opt/upFiles directory. This affects all organizations running vulnerable Jeecgboot installations, potentially allowing unauthorized file uploads to sensitive system locations.
💻 Affected Systems
- Jeecgboot
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could upload malicious files (like scripts or backdoors) to the /opt directory, potentially leading to remote code execution, system compromise, or data exfiltration.
Likely Case
Attackers upload web shells or malicious scripts to the /opt directory, enabling persistence, data theft, or lateral movement within the system.
If Mitigated
If proper file upload validation and directory restrictions are in place, attackers can only upload harmless files to unintended locations with minimal impact.
🎯 Exploit Status
Exploitation requires sending specially crafted requests to the vulnerable endpoint, but specific exploit details are not publicly documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.8.3 or later
Vendor Advisory: https://github.com/jeecgboot/JeecgBoot/issues/8827
Restart Required: Yes
Instructions:
1. Upgrade Jeecgboot to version 3.8.3 or later. 2. Restart the application server. 3. Verify the fix by testing the /sys/comment/addFile endpoint.
🔧 Temporary Workarounds
Restrict access to vulnerable endpoint
linuxBlock or restrict access to the /sys/comment/addFile endpoint using web application firewall rules or access controls.
# Example using iptables: iptables -A INPUT -p tcp --dport 80 -m string --string "/sys/comment/addFile" --algo bm -j DROP
# Example using nginx: location ~ ^/sys/comment/addFile { deny all; }
Implement file upload validation
allAdd server-side validation to ensure uploaded files are saved only to the intended /opt/upFiles directory.
# Modify application code to validate destination path before saving files
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Jeecgboot instances from critical systems.
- Deploy a web application firewall (WAF) with rules to detect and block path traversal attempts.
🔍 How to Verify
Check if Vulnerable:
Check if Jeecgboot version is 3.8.2 or earlier and if the /sys/comment/addFile endpoint is accessible.Check Version:
Check the Jeecgboot application version in the admin interface or configuration files.Verify Fix Applied:
After patching, attempt to upload a file via the /sys/comment/addFile endpoint and verify it only saves to /opt/upFiles, not /opt.📡 Detection & Monitoring
Log Indicators:
- Unusual file upload requests to /sys/comment/addFile
- Files being created in /opt directory instead of /opt/upFiles
- HTTP requests with path traversal patterns in parameters
Network Indicators:
- HTTP POST requests to /sys/comment/addFile with unusual file paths or extensions
- Increased upload traffic to the vulnerable endpoint
SIEM Query:
source="web_server" AND (url="/sys/comment/addFile" AND (file_path CONTAINS "../" OR destination CONTAINS "/opt/"))