CVE-2025-8020
📋 TL;DR
The private-ip npm package is vulnerable to Server-Side Request Forgery (SSRF) because it fails to properly validate multicast IP addresses (224.0.0.0/4). Attackers can bypass IP validation checks to make the server send requests to internal network resources. Any application using this package to validate IP addresses is affected.
💻 Affected Systems
- private-ip npm package
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Attackers could access sensitive internal services, exfiltrate data from cloud metadata endpoints, or pivot to attack internal infrastructure.
Likely Case
Information disclosure from internal services, scanning of internal networks, or accessing cloud metadata services.
If Mitigated
Limited impact if network segmentation restricts internal service access or if additional validation layers exist.
🎯 Exploit Status
Exploitation requires the application to accept user-controlled IP addresses and use private-ip for validation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: N/A
Vendor Advisory: https://security.snyk.io/vuln/SNYK-JS-PRIVATEIP-9510757
Restart Required: No
Instructions:
1. Remove private-ip package. 2. Use alternative IP validation libraries or implement custom validation that includes multicast ranges. 3. Update dependencies and redeploy applications.
🔧 Temporary Workarounds
Implement custom IP validation
allReplace private-ip usage with custom validation that properly checks for multicast addresses
Network segmentation
allRestrict outbound network access from vulnerable servers to limit SSRF impact
🧯 If You Can't Patch
- Implement strict input validation to reject multicast IP addresses before they reach private-ip
- Deploy network controls to limit outbound connections from affected servers
🔍 How to Verify
Check if Vulnerable:
Check package.json for private-ip dependency and verify if application accepts user-controlled IP addressesCheck Version:
npm list private-ipVerify Fix Applied:
Confirm private-ip is removed from dependencies and test with multicast IP addresses (224.0.0.1) to ensure they are rejected📡 Detection & Monitoring
Log Indicators:
- Unusual outbound requests to multicast IP ranges
- Requests to internal services from unexpected sources
Network Indicators:
- Outbound traffic to 224.0.0.0/4 range from application servers
- Internal service access from application servers
SIEM Query:
source_ip IN (application_servers) AND dest_ip IN (224.0.0.0/4)