What’s Vulnerable › Vulnerabilities

CVE-2021-31597

• Severity: critical (CVSS 9.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-23 · updated 2026-06-17
• Weakness: CWE-295

Description

The xmlhttprequest-ssl package before 1.6.1 for Node.js disables SSL certificate validation by default, because rejectUnauthorized (when the property exists but is undefined) is considered to be false within the https.request function of Node.js. In other words, no certificate is ever rejected.

Affected products

• Xmlhttprequest-Ssl Project Xmlhttprequest-Ssl: before 1.6.1 — fixed in 1.6.1

How to fix

Upgrade to a fixed version: Xmlhttprequest-Ssl Project Xmlhttprequest-Ssl 1.6.1. Check the vendor advisory for mitigations.

References

• https://github.com/mjwwit/node-XMLHttpRequest/commit/bf53329b61ca6afc5d28f6b8d2dc2e3ca740a9b2
• https://github.com/mjwwit/node-XMLHttpRequest/compare/v1.6.0...1.6.1
• https://people.kingsds.network/wesgarland/xmlhttprequest-ssl-vuln.txt
• https://security.netapp.com/advisory/ntap-20210618-0004/
• https://github.com/mjwwit/node-XMLHttpRequest/commit/bf53329b61ca6afc5d28f6b8d2dc2e3ca740a9b2
• https://github.com/mjwwit/node-XMLHttpRequest/compare/v1.6.0...1.6.1
• https://people.kingsds.network/wesgarland/xmlhttprequest-ssl-vuln.txt
• https://security.netapp.com/advisory/ntap-20210618-0004/

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