CVE-2021-23574

HIGHNVD 7.59.8▲

7.5

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.

CVSS v3: 7.5
EG Score: 9.8(medium)
EPSS: 79.8%
KEV: Not listed

Published

December 24, 2021

Last Modified

November 21, 2024

References (12)

report@snykhttps://github.com/js-data/js-data/blob/master/dist/js-data.js%23L472
report@snykhttps://github.com/js-data/js-data/issues/576
report@snykhttps://github.com/js-data/js-data/issues/577
report@snykhttps://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-2320790
report@snykhttps://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2320791
report@snykhttps://snyk.io/vuln/SNYK-JS-JSDATA-1584361
af854a3a-2127-422b-91ae-364da2661108https://github.com/js-data/js-data/blob/master/dist/js-data.js%23L472
af854a3a-2127-422b-91ae-364da2661108https://github.com/js-data/js-data/issues/576
af854a3a-2127-422b-91ae-364da2661108https://github.com/js-data/js-data/issues/577
af854a3a-2127-422b-91ae-364da2661108https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-2320790
af854a3a-2127-422b-91ae-364da2661108https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2320791
af854a3a-2127-422b-91ae-364da2661108https://snyk.io/vuln/SNYK-JS-JSDATA-1584361

Patch Availability(1)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
npm	js-data	—	ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)

npm(1)

Package	Vulnerable range	Fixed in	Dependents
js-data	—	—	—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-1321Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution)

Data Freshness Timeline

(refreshed 11× in last 7d / 19× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 05:49 UTCEG score recompute
2026-05-26 05:49 UTCGHSA enrichment
2026-05-24 16:49 UTCepss_batch

Frequently asked(5)

What is CVE-2021-23574?

CVE-2021-23574 is a high vulnerability published on December 24, 2021. 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.

When was CVE-2021-23574 disclosed?

CVE-2021-23574 was first published in the National Vulnerability Database on December 24, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-23574 actively exploited?

CVE-2021-23574 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 79.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

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

CVE-2021-23574 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.8.

How do I remediate CVE-2021-23574?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-23574, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-23574

📅 Published

🔄 Last Modified

🔗 References (12)