CVE-2021-21304

Name: CVE-2021-21304
Creator: NVD / NIST
Published: 2021-02-08T18:15:13.537+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.89%

Last modified Jun 17, 2026

CVE-2021-21304 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Dynamoose is an open-source modeling tool for Amazon's DynamoDB. In Dynamoose from version 2.0.0 and before version 2.7.0 there was a prototype pollution vulnerability in the internal utility method "lib/utils/object/set.ts". EPSS estimates a 1.89% chance of exploitation in the next 30 days.

Description

Dynamoose is an open-source modeling tool for Amazon's DynamoDB. In Dynamoose from version 2.0.0 and before version 2.7.0 there was a prototype pollution vulnerability in the internal utility method "lib/utils/object/set.ts". This method is used throughout the codebase for various operations throughout Dynamoose. We have not seen any evidence of this vulnerability being exploited. There is no evidence this vulnerability impacts versions 1.x.x since the vulnerable method was added as part of the v2 rewrite. This vulnerability also impacts v2.x.x beta/alpha versions. Version 2.7.0 includes a patch for this vulnerability.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.89%

77.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Dynamoosejs	Dynamoose	>= 2.0.0, < 2.7.0

References

https://github.com/dynamoose/dynamoose/commit/324c62b4709204955931a187362f8999805b1d8ePatch, Third Party Advisory
https://github.com/dynamoose/dynamoose/releases/tag/v2.7.0Release Notes, Third Party Advisory
https://github.com/dynamoose/dynamoose/security/advisories/GHSA-rrqm-p222-8ph2Patch, Third Party Advisory
https://www.npmjs.com/package/dynamooseProduct, Third Party Advisory
https://github.com/dynamoose/dynamoose/commit/324c62b4709204955931a187362f8999805b1d8ePatch, Third Party Advisory
https://github.com/dynamoose/dynamoose/releases/tag/v2.7.0Release Notes, Third Party Advisory
https://github.com/dynamoose/dynamoose/security/advisories/GHSA-rrqm-p222-8ph2Patch, Third Party Advisory
https://www.npmjs.com/package/dynamooseProduct, Third Party Advisory

Timeline

Published: Feb 8, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21304?

How severe is CVE-2021-21304?

CVE-2021-21304 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.89% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21304?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21304?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST