CRITICAL

CVE-2021-23574

CVSS v3

9.8

CRITICAL

EPSS Score

2.2 %

exploit probability, as of 2026-10-19

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

js-datanpmall versions · no fixed version listed

Full record on NVD

Description

All versions of package js-data are vulnerable to Prototype Pollution via the deepFillIn and the set functions. This is an incomplete fix of [CVE-2020-28442](https://snyk.io/vuln/SNYK-JS-JSDATA-1023655).

Technical details

Published: 2021-12-24

Frequently asked questions

What is CVE-2021-23574?

Is CVE-2021-23574 actively exploited?

Active exploitation of CVE-2021-23574 has not been confirmed. Its EPSS score was 2.2% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-23574?

CVE-2021-23574 has a CVSS v3 base score of 9.8 (CRITICAL severity).

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