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CVE-2021-4329

31
FAUCET Score

CVE-2021-4329 is a critical command injection vulnerability affecting json-logic-js version 2.0.0, specifically within an unknown functionality of the logic.js file. This vulnerability carries a CVSS score of 9.8, indicating a severe impact with high confidentiality, integrity, and availability compromise, and can be exploited remotely without user interaction or authentication. While no active exploits, Metasploit modules, or public exploit code are currently available, and community discussion is minimal, upgrading to json-logic-js version 2.0.1 is strongly recommended to remediate this flaw.

Impacted Technologies

VendorProductVersion(s)CPE
2.0.0CPE matchmatch criteria
cpe:2.3:a:json-logic-js_project:json-logic-js:2.0.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
2.1
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.19%
Probability of exploitation in next 30 days
EPSS Percentile
80.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0219 is in the 70th percentile among its peer group of 36,862 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: json-logic-jsFixed in: 2.0.1

Vendor Advisories (1)

npmGHSA-67j4-2mh6-8627critical

json-logic-js Command Injection vulnerability

Mar 5, 2023

References

github.com / jwadhams/json-logic-js/commit/c1dd82f5b15d8a553bb7a0cfa841ab8a11a9c227
Patch
github.com / jwadhams/json-logic-js/pull/98
Patch
vuldb.com
Permissions RequiredThird Party Advisory
vuldb.com
Permissions RequiredThird Party Advisory