CVE-2025-11630
📋 TL;DR
This CVE describes a path traversal vulnerability in RainyGao DocSys up to version 2.02.36. Attackers can remotely exploit the file upload function to write arbitrary files to unintended directories, potentially leading to unauthorized file access or system compromise. Organizations using vulnerable versions of DocSys are affected.
💻 Affected Systems
- RainyGao DocSys
📦 What is this software?
Docsys by Docsys Project
⚠️ Risk & Real-World Impact
Worst Case
Remote attackers could write malicious files to sensitive system directories, potentially achieving remote code execution, data theft, or complete system compromise.
Likely Case
Attackers upload malicious files to web-accessible directories, enabling web shell deployment, data exfiltration, or privilege escalation.
If Mitigated
With proper file upload validation and directory restrictions, impact is limited to unauthorized file writes within controlled directories.
🎯 Exploit Status
Exploit details are publicly available in GitHub repositories. The vulnerability requires manipulation of the 'path' parameter during file upload.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None - vendor did not respond to disclosure
Restart Required: No
Instructions:
No official patch available. Consider upgrading to any version above 2.02.36 if available, or implement workarounds.
🔧 Temporary Workarounds
Web Application Firewall (WAF) Rules
allImplement WAF rules to block path traversal patterns in file upload requests
Configure WAF to block requests containing '../', '..\', or similar traversal sequences in upload parameters
File Upload Restriction
allRestrict file upload functionality to authenticated users only and implement strict file type validation
Implement authentication middleware for /Doc/uploadDoc.do endpoint
Configure file type whitelisting (e.g., only allow .doc, .pdf, .txt)
🧯 If You Can't Patch
- Isolate DocSys instance behind network segmentation with strict inbound/outbound rules
- Implement file integrity monitoring on web directories to detect unauthorized file writes
🔍 How to Verify
Check if Vulnerable:
Test if you can upload a file with path traversal sequences (e.g., '../../malicious.php') to /Doc/uploadDoc.do endpointCheck Version:
Check DocSys version in web interface or configuration filesVerify Fix Applied:
Attempt the same path traversal upload test; successful blocking indicates mitigation📡 Detection & Monitoring
Log Indicators:
- Multiple failed upload attempts with path traversal patterns
- Successful uploads to non-standard directories
- Unusual file types in upload logs
Network Indicators:
- HTTP POST requests to /Doc/uploadDoc.do containing '../' sequences
- Unusual outbound connections from DocSys server
SIEM Query:
source="DocSys" AND (url_path="/Doc/uploadDoc.do" AND (request_body CONTAINS "../" OR request_body CONTAINS "..\"))🔗 References
- https://github.com/xkalami-Tta0/CVE/blob/main/DocSys/%E4%BB%BB%E6%84%8F%E6%96%87%E4%BB%B6%E4%B8%8A%E4%BC%A0.md
- https://vuldb.com/?ctiid.328042
- https://vuldb.com/?id.328042
- https://vuldb.com/?submit.664845
- https://github.com/xkalami-Tta0/CVE/blob/main/DocSys/%E4%BB%BB%E6%84%8F%E6%96%87%E4%BB%B6%E4%B8%8A%E4%BC%A0.md
