What’s Vulnerable › Vulnerabilities

CVE-2021-23574: Prototype Pollution

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-12-24 · updated 2026-06-17
• Weakness: CWE-1321

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).

Affected products

• js-data: before 3.0.11 — fixed in 3.0.11

How to fix

Upgrade to a fixed version: js-data 3.0.11. Check the vendor advisory for mitigations.

References

• https://github.com/js-data/js-data/blob/master/dist/js-data.js%23L472
• https://github.com/js-data/js-data/issues/576
• https://github.com/js-data/js-data/issues/577
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-2320790
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2320791
• https://snyk.io/vuln/SNYK-JS-JSDATA-1584361
• https://github.com/js-data/js-data/blob/master/dist/js-data.js%23L472
• https://github.com/js-data/js-data/issues/576
• https://github.com/js-data/js-data/issues/577
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-2320790
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2320791
• https://snyk.io/vuln/SNYK-JS-JSDATA-1584361

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