CVE-2025-31117
📋 TL;DR
This Out-of-Band Server-Side Request Forgery (OOB SSRF) vulnerability in OpenEMR allows attackers to force the server to make unauthorized requests to external or internal resources. Attackers can exploit this through DNS or HTTP interactions to exfiltrate sensitive information without receiving direct responses. All OpenEMR installations before version 7.0.3.1 are affected.
💻 Affected Systems
- OpenEMR
📦 What is this software?
Openemr by Open Emr
⚠️ Risk & Real-World Impact
Worst Case
Complete data exfiltration including patient health records, authentication credentials, and internal network information through blind SSRF attacks.
Likely Case
Exfiltration of sensitive configuration data, internal service enumeration, and potential access to internal-only resources.
If Mitigated
Limited impact with proper network segmentation and egress filtering, though some information leakage may still occur.
🎯 Exploit Status
Exploitation requires understanding of OOB SSRF techniques and setting up external servers to receive exfiltrated data.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.0.3.1
Vendor Advisory: https://github.com/openemr/openemr/security/advisories/GHSA-2pvv-ph3x-2f9h
Restart Required: No
Instructions:
1. Backup your OpenEMR installation and database. 2. Download OpenEMR version 7.0.3.1 or later from the official repository. 3. Replace the existing installation with the patched version. 4. Verify the fix by checking the version and testing the vulnerable functionality.
🔧 Temporary Workarounds
Network Egress Filtering
allRestrict outbound network connections from the OpenEMR server to only necessary external services.
Web Application Firewall Rules
allImplement WAF rules to block SSRF patterns and unusual outbound requests from the application.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate OpenEMR from sensitive internal resources
- Deploy a reverse proxy with request validation to filter malicious SSRF attempts
🔍 How to Verify
Check if Vulnerable:
Check if your OpenEMR version is below 7.0.3.1 by examining the version in the admin interface or checking the source code.Check Version:
Check the OpenEMR admin dashboard or examine the version.php file in the installation directory.Verify Fix Applied:
Verify the installation is version 7.0.3.1 or higher and test the previously vulnerable functionality with controlled SSRF payloads.📡 Detection & Monitoring
Log Indicators:
- Unusual outbound HTTP/DNS requests from the OpenEMR server
- Requests to unexpected external domains or internal IPs
- DNS queries for attacker-controlled domains
Network Indicators:
- Outbound connections from OpenEMR to unusual external services
- DNS requests for domains with long subdomains (common in OOB exfiltration)
- HTTP requests with encoded data in URLs
SIEM Query:
source="openemr-logs" AND (url="*http://*" OR url="*https://*") AND NOT url="*expected-domain.com*"