CVE-2025-24989
📋 TL;DR
An improper access control vulnerability in Microsoft Power Pages allows unauthorized attackers to bypass user registration controls and elevate privileges over a network. This affects Power Pages customers who haven't applied the service update. Microsoft has already mitigated the vulnerability in their service and notified affected customers.
💻 Affected Systems
- Microsoft Power Pages
📦 What is this software?
Power Pages by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative access to Power Pages sites, potentially compromising sensitive data, modifying site content, or using the platform as a foothold for further attacks.
Likely Case
Unauthorized users register accounts with elevated privileges, gaining access to restricted content or functionality they shouldn't have.
If Mitigated
Proper access controls prevent privilege escalation, maintaining normal user registration workflows and authorization boundaries.
🎯 Exploit Status
Exploitation requires network access and understanding of Power Pages registration controls. CISA has added this to their Known Exploited Vulnerabilities catalog.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Service update already applied by Microsoft
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-24989
Restart Required: No
Instructions:
1. Microsoft has already applied the fix to their service. 2. If you were notified as affected, follow Microsoft's instructions for reviewing sites and cleanup. 3. If you weren't notified, you're not affected.
🔧 Temporary Workarounds
Review and cleanup as instructed
allFollow Microsoft's provided instructions to review Power Pages sites for exploitation and perform any necessary cleanup
🧯 If You Can't Patch
- Monitor Power Pages sites for unauthorized user registrations or privilege changes
- Implement additional authentication/authorization controls if possible
🔍 How to Verify
Check if Vulnerable:
Check if you received notification from Microsoft about this vulnerability. If not notified, you're not affected.Check Version:
Not applicable - cloud service updateVerify Fix Applied:
Microsoft has already applied the fix to their service. Verify by checking that user registration controls are functioning as expected.📡 Detection & Monitoring
Log Indicators:
- Unexpected user registrations
- Privilege escalation events
- Unauthorized access attempts to restricted areas
Network Indicators:
- Unusual registration traffic patterns
- Authentication bypass attempts
SIEM Query:
Search for user registration events outside normal patterns or privilege changes in Power Pages audit logs