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CVE-2021-21304

29
FAUCET Score

CVE-2021-21304 is a critical prototype pollution vulnerability affecting Dynamoose, an open-source modeling tool for Amazon's DynamoDB, specifically versions 2.0.0 through 2.6.0. This flaw resides in the internal utility method "lib/utils/object/set.ts" and is rated 9.8 CRITICAL (CVSSv3.1), indicating a network-exploitable vulnerability with low attack complexity that could lead to complete compromise of confidentiality, integrity, and availability. While no active exploitation, public exploit code, or significant community discussion has been observed, the high severity warrants immediate patching to version 2.7.0 or later.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.0.0, < 2.7.0CPE matchmatch criteria
cpe:2.3:a:dynamoosejs:dynamoose:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

7.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
2.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.89%
Probability of exploitation in next 30 days
EPSS Percentile
77.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0189 is in the 66th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: dynamooseFixed in: 2.7.0

Vendor Advisories (1)

npmGHSA-rrqm-p222-8ph2high

Prototype Pollution in Dynamoose

Feb 8, 2021

References

github.com / dynamoose/dynamoose/commit/324c62b4709204955931a187362f8999805b1d8e
PatchThird Party Advisory
github.com / dynamoose/dynamoose/releases/tag/v2.7.0
Release NotesThird Party Advisory
github.com / dynamoose/dynamoose/security/advisories/GHSA-rrqm-p222-8ph2
PatchThird Party Advisory
npmjs.com / package/dynamoose
ProductThird Party Advisory