Authentication Weakness in keystone

keystone Updated 02 Oct 2025

Summary

19/08/2020

Disclosed on

MODERATE

Severity

Yes i

Fix available

Moderate

Severity

Not published

CVSS Score

GHSA-9xgp-hfw7-73rq: Authentication Weakness in keystone. Affects keystone versions < 0.3.16. Fixed in 0.3.16. How to fix ↓

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Background

Keystone is an npm package that provides authentication functionality. It allows users to sign in using their email address and password. However, a vulnerability has been discovered in versions prior to 0.3.16 that allows incomplete email addresses to be matched during the sign-in process. While a correct password is still required, this weakness could potentially lead to unauthorized access to user accounts.

Vulnerability Detail

The vulnerability in keystone arises from a bug in the default sign-in functionality. Incomplete email addresses can be matched, allowing an attacker to potentially guess the complete email address and gain unauthorized access to an account by providing the correct password. This vulnerability has a moderate severity rating and has been reviewed by GitHub. No Common Weakness Enumeration (CWE) IDs have been associated with this vulnerability.

How To Fix

Latest published version: 4.2.1 as of 22 Oct 2026

npm install keystone@4.2.1

Upgrading to it may include breaking changes; the version below is the minimum fixed release for this vulnerability.

If you need the minimum change

0.3.16

This is the first release that contains the fix.

npm install keystone@0.3.16

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Conclusion

In conclusion, the keystone package prior to version 0.3.16 has an authentication weakness that allows incomplete email addresses to be matched during sign-in. This could potentially lead to unauthorized access to user accounts. It is recommended to upgrade to version 0.3.16 or later to fix this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

See every vulnerability recorded for keystone →