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CVE-2021-4299

24
FAUCET Score

CVE-2021-4299 is a high-severity vulnerability affecting the naturalSort function in cronvel string-kit versions up to 0.12.7, specifically within the lib/naturalSort.js file. This flaw, categorized as inefficient regular expression complexity (CWE-1333), allows for remote attacks. A successful exploit could lead to a denial of service (availability impact) due to the inefficient regex processing. While the CVSS score is 7.5 (High), there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability. Upgrading to string-kit version 0.12.8 resolves the issue.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.12.8CPE matchmatch criteria
cpe:2.3:a:string_kit_project:string_kit:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.93%
Probability of exploitation in next 30 days
EPSS Percentile
56.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0093 is in the 32nd percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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: string-kitFixed in: 0.12.8

Vendor Advisories (1)

npmGHSA-pfrm-4rjw-g9q5high

string-kit Inefficient Regular Expression Complexity vulnerability

Jan 2, 2023

References

github.com / cronvel/string-kit/commit/9cac4c298ee92c1695b0695951f1488884a7ca73
PatchThird Party Advisory
github.com / cronvel/string-kit/releases/tag/v0.12.8
Release NotesThird Party Advisory
vuldb.com
Third Party Advisory
vuldb.com
Third Party Advisory