MEDIUM

CVE-2021-23566

CVSS v3

5.5

MEDIUM

EPSS Score

0.4 %

exploit probability, as of 2026-10-16

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

nanoidnpmfrom 3.0.0 · fixed in 3.1.31

Vendor advisories

CVE-2021-23566 Red Hat Product Security7 products fixed · 7 known affected
nanoid: Information disclosure via valueOf() function
migration-toolkit-virtualization/mtv-ui-rhel8 as a component of Migration Toolkit for Virtualization · rhacm2/console-rhel8 as a component of Red Hat Advanced Cluster Management for Kubernetes 2 · rhacm2/grc-ui-rhel8 as a component of Red Hat Advanced Cluster Management for Kubernetes 2
RHSA-2022:6156 Red Hat Product Security3 products fixed
Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.11.0 security, enhancement, & bugfix update
RHSA-2022:5069 Red Hat Product Security4 products fixed
Red Hat Security Advisory: OpenShift Container Platform 4.11.0 bug fix and security update
RHSA-2022:1476 Red Hat Product Security221 products fixed
Red Hat Security Advisory: Red Hat Advanced Cluster Management 2.4.3 security updates and bug fixes

Full record on NVD

Description

The package nanoid from 3.0.0 and before 3.1.31 are vulnerable to Information Exposure via the valueOf() function which allows to reproduce the last id generated.

Technical details

Published: 2022-01-14

Frequently asked questions

What is CVE-2021-23566?

The package nanoid from 3.0.0 and before 3.1.31 are vulnerable to Information Exposure via the valueOf() function which allows to reproduce the last id generated.

Is CVE-2021-23566 actively exploited?

Active exploitation of CVE-2021-23566 has not been confirmed. Its EPSS score was 0.4% on 2026-10-16, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-23566?

CVE-2021-23566 has a CVSS v3 base score of 5.5 (MEDIUM severity).

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