CVE-2025-14198
📋 TL;DR
This vulnerability in Verysync 2.21.3 allows remote attackers to access sensitive information through the web administration module. The exploit targets the /safebrowsing/clientreport/download endpoint with a manipulated key parameter, enabling unauthorized data disclosure. All systems running the vulnerable version 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
Complete system compromise through disclosure of authentication tokens, configuration files, or sensitive user data leading to further attacks.
Likely Case
Exposure of sensitive information such as configuration details, user data, or internal system information that could facilitate additional attacks.
If Mitigated
Limited impact with proper network segmentation and access controls preventing external exploitation.
🎯 Exploit Status
Exploit is publicly available and requires minimal technical skill to execute.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Vendor has not responded to disclosure. Consider workarounds or alternative solutions.
🔧 Temporary Workarounds
Disable Web Administration
allTurn off the web administration interface to prevent remote exploitation.
Edit Verysync configuration to disable web admin interface
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
- Monitor for unusual access patterns to the /safebrowsing/clientreport/download endpoint
🔍 How to Verify
Check if Vulnerable:
Check if Verysync version is 2.21.3 and web admin is accessible. Test by accessing /safebrowsing/clientreport/download?key=dummytokenCheck Version:
Check Verysync configuration file or web interface for version informationVerify Fix Applied:
Verify web admin is disabled or inaccessible, or that the endpoint no longer returns sensitive information.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /safebrowsing/clientreport/download with unusual key parameters
- Multiple failed or suspicious access attempts to web admin
Network Indicators:
- Unusual traffic patterns to Verysync web port from untrusted sources
- Requests with manipulated key parameters
SIEM Query:
source="verysync.log" AND (uri="/safebrowsing/clientreport/download" OR user_agent="exploit")