CVE-2025-53760
📋 TL;DR
This Server-Side Request Forgery (SSRF) vulnerability in Microsoft Office SharePoint allows authenticated attackers to make unauthorized requests from the SharePoint server to internal network resources. Attackers can exploit this to elevate privileges and potentially access sensitive internal systems. Organizations using vulnerable SharePoint versions are affected.
💻 Affected Systems
- Microsoft Office SharePoint Server
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete network compromise where attackers pivot from SharePoint to access domain controllers, databases, cloud metadata services, or other critical infrastructure, leading to data exfiltration or ransomware deployment.
Likely Case
Privilege escalation within SharePoint environment leading to unauthorized access to internal applications, file shares, or APIs that SharePoint can reach, potentially exposing sensitive data.
If Mitigated
Limited impact with proper network segmentation, where SharePoint servers have minimal network access and SSRF protections are implemented.
🎯 Exploit Status
Exploitation requires authenticated access and knowledge of SharePoint functionality that processes URLs. Attackers need to craft specific requests to trigger the SSRF.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Security Update Guide for specific patch versions
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53760
Restart Required: Yes
Instructions:
1. Review Microsoft Security Update Guide for CVE-2025-53760. 2. Download and apply the appropriate security update for your SharePoint version. 3. Restart SharePoint services or the server as required. 4. Test functionality after patching.
🔧 Temporary Workarounds
Restrict SharePoint Network Access
windowsImplement network segmentation to limit SharePoint server outbound connections to only necessary internal resources
Use Windows Firewall: New-NetFirewallRule -DisplayName "Block SharePoint Outbound" -Direction Outbound -Program "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\*" -Action Block
URL Validation Controls
allImplement input validation for URL parameters in custom SharePoint solutions and web parts
🧯 If You Can't Patch
- Implement strict network segmentation to isolate SharePoint servers from sensitive internal systems
- Enable and monitor audit logs for unusual outbound requests from SharePoint servers
🔍 How to Verify
Check if Vulnerable:
Check SharePoint version against Microsoft's security bulletin for CVE-2025-53760Check Version:
Get-SPFarm | Select BuildVersionVerify Fix Applied:
Verify patch installation through Central Administration > Upgrade and Migration > Check product and patch installation status📡 Detection & Monitoring
Log Indicators:
- Unusual outbound HTTP requests from SharePoint servers to internal IP ranges
- Multiple failed authentication attempts followed by successful login and unusual URL requests
Network Indicators:
- HTTP requests from SharePoint servers to unexpected internal endpoints (like metadata services, database ports, administrative interfaces)
- Pattern of requests to sequential internal IP addresses
SIEM Query:
source="SharePoint" AND (url="*://169.254.169.254*" OR url="*://metadata.google.internal*" OR url="*://192.168.*" OR url="*://10.*" OR url="*://172.16.*")