Server-Side Request Forgery (SSRF) Affecting private-ip package, versions *
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-JS-PRIVATEIP-9510757
- published22 Jul 2025
- disclosed23 Mar 2025
- creditLiran Tal
Introduced: 23 Mar 2025
CVE-2025-8020 (opens in a new tab)How to fix?
There is no fixed version for private-ip.
Overview
private-ip is a Check if IP address is private.
Affected versions of this package are vulnerable to Server-Side Request Forgery (SSRF) where an attacker can provide an IP or hostname that resolves to a multicast IP address (224.0.0.0/4) which is not included as part of the private IP ranges in the package's source code.
PoC
- Define an app.js file with the programmatic API of private-ip as follows:
import is_ip_private from 'private-ip' import ipaddr from 'ipaddr.js'// -- private-ip console.log(is_ip_private('127.0.0.1')) console.log(is_ip_private('10.0.0.0')) console.log(is_ip_private('169.254.0.1')) console.log(is_ip_private('239.255.255.250'))
// -- ipaddr.js console.log(ipaddr.parse('127.0.0.1').range()) console.log(ipaddr.parse('10.0.0.0').range()) console.log(ipaddr.parse('169.254.0.1').range()) console.log(ipaddr.parse('239.255.255.250').range())
Run the app.js file
Observe that the private-ip package does not detect the multicast IP address
239.255.255.250as a private IP address and returnstruefor all 4 checks.