CVE-2025-14267
📋 TL;DR
This vulnerability in M-Files Server allows sensitive information to be exposed due to incomplete data removal before transfer. It affects organizations using M-Files Server versions before 25.12.15491.7 for document management and collaboration.
💻 Affected Systems
- M-Files Server
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Sensitive documents, credentials, or proprietary information could be exposed to unauthorized parties, leading to data breaches, regulatory violations, and reputational damage.
Likely Case
Accidental exposure of metadata or partial document content during normal file transfers or synchronization processes.
If Mitigated
Minimal impact with proper access controls, encryption in transit, and network segmentation limiting exposure.
🎯 Exploit Status
Exploitation likely requires some level of access to the M-Files system or network traffic interception.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 25.12.15491.7 and later
Vendor Advisory: https://product.m-files.com/security-advisories/cve-2025-14267/
Restart Required: Yes
Instructions:
1. Download M-Files Server version 25.12.15491.7 or later from M-Files support portal. 2. Backup current configuration and data. 3. Run installer with administrative privileges. 4. Restart M-Files Server services.
🔧 Temporary Workarounds
Enable Transport Encryption
windowsForce all M-Files communications to use TLS encryption to prevent data interception.
Configure M-Files Server to require HTTPS/TLS for all connections
Network Segmentation
allIsolate M-Files Server to internal network segments with strict access controls.
Configure firewall rules to restrict M-Files Server traffic to authorized IPs only
🧯 If You Can't Patch
- Implement strict access controls and audit all sensitive document transfers
- Deploy network monitoring and DLP solutions to detect potential data leaks
🔍 How to Verify
Check if Vulnerable:
Check M-Files Server version in Administration tool or registry: HKEY_LOCAL_MACHINE\SOFTWARE\M-Files\Server\VersionCheck Version:
reg query "HKLM\SOFTWARE\M-Files\Server" /v VersionVerify Fix Applied:
Confirm version is 25.12.15491.7 or higher and test sensitive document transfers for data exposure.📡 Detection & Monitoring
Log Indicators:
- Unusual file transfer patterns
- Large data transfers to unexpected destinations
- Failed access attempts to sensitive documents
Network Indicators:
- Unencrypted transfers of M-Files data
- Unexpected outbound connections from M-Files Server
SIEM Query:
source="m-files-server" AND (event_type="file_transfer" AND size>100MB) OR (dest_ip NOT IN [authorized_ips])