CVE-2025-14199
📋 TL;DR
This vulnerability allows remote attackers to upload arbitrary files to Verysync 微力同步 web administration interface without proper restrictions. Attackers can exploit this flaw to potentially upload malicious files and execute code on affected systems. All users running Verysync up to version 2.21.3 with web administration enabled are affected.
💻 Affected Systems
- Verysync 微力同步
📦 What is this software?
Verysync by Verysync
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Unauthorized file upload allowing attackers to deploy web shells, deface websites, or establish persistence.
If Mitigated
Limited impact if proper network segmentation and file upload validation are implemented.
🎯 Exploit Status
Exploit details are publicly available on GitHub and vuldb.com, making this easily exploitable.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Vendor did not respond to disclosure. Consider upgrading to any version above 2.21.3 if available, or implement workarounds.
🔧 Temporary Workarounds
Disable Web Administration Interface
allDisable the web administration module if not required for operations.
Edit Verysync configuration to disable web interface or block port access
Network Access Control
linuxRestrict access to Verysync web interface using firewall rules.
iptables -A INPUT -p tcp --dport [verysync_port] -s [trusted_ips] -j ACCEPT
iptables -A INPUT -p tcp --dport [verysync_port] -j DROP
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Verysync instances from critical systems
- Deploy web application firewall (WAF) with file upload filtering rules
🔍 How to Verify
Check if Vulnerable:
Check Verysync version. If version is 2.21.3 or earlier, system is vulnerable. Test by attempting to upload a file to /rest/f/api/resources/f96956469e7be39d/tmp/text.txt?override=false endpoint.Check Version:
Check Verysync configuration file or web interface for version informationVerify Fix Applied:
Verify web administration interface is disabled or inaccessible, or that file upload restrictions are properly implemented.📡 Detection & Monitoring
Log Indicators:
- Unusual file upload activity to /rest/f/api/resources/ paths
- Multiple failed or successful upload attempts from single IP
Network Indicators:
- HTTP POST requests to /rest/f/api/resources/f96956469e7be39d/tmp/text.txt?override=false
- Unusual outbound connections from Verysync server
SIEM Query:
source="verysync.log" AND (uri_path="/rest/f/api/resources/*" AND method="POST")