CVE-2025-47966
📋 TL;DR
This vulnerability in Microsoft Power Automate allows unauthorized attackers to access sensitive information over a network, potentially leading to privilege escalation. It affects organizations using Power Automate with default configurations. The high CVSS score indicates critical impact potential.
💻 Affected Systems
- Microsoft Power Automate
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of Power Automate environment, unauthorized access to sensitive data, and lateral movement to connected systems.
Likely Case
Unauthorized access to sensitive information stored in Power Automate flows, credentials, or configuration data.
If Mitigated
Limited impact with proper network segmentation and access controls in place.
🎯 Exploit Status
The vulnerability description suggests network-based exploitation without authentication. No public exploit code available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Security Update Guide for specific version
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-47966
Restart Required: Yes
Instructions:
1. Review Microsoft Security Update Guide for CVE-2025-47966
2. Apply the latest Power Automate updates from Microsoft
3. Restart affected Power Automate services
4. Verify the update was applied successfully
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Power Automate servers to authorized networks only
Use firewall rules to limit inbound connections to Power Automate servers
Access Control Hardening
allImplement strict authentication and authorization controls for Power Automate
Configure Power Automate to require multi-factor authentication
Implement least privilege access principles
🧯 If You Can't Patch
- Implement network segmentation to isolate Power Automate servers
- Enable detailed logging and monitoring for suspicious access attempts
🔍 How to Verify
Check if Vulnerable:
Check Power Automate version against Microsoft's security advisoryCheck Version:
Check Power Automate version through administrative interface or PowerShell commands specific to your deploymentVerify Fix Applied:
Verify Power Automate version matches or exceeds the patched version specified by Microsoft📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to Power Automate APIs
- Unusual authentication patterns
- Access from unexpected IP addresses
Network Indicators:
- Unusual network traffic to Power Automate servers
- Port scanning activity targeting Power Automate ports
SIEM Query:
source="PowerAutomate" AND (event_type="authentication_failure" OR event_type="unauthorized_access")