CVE-2021-33623

Name: CVE-2021-33623
Creator: NVD / NIST
Published: 2021-05-28T18:15:07.537+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 2.85%

Last modified Jun 17, 2026

CVE-2021-33623 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The trim-newlines package before 3.0.1 and 4.x before 4.0.1 for Node.js has an issue related to regular expression denial-of-service (ReDoS) for the .end() method.. EPSS estimates a 2.85% chance of exploitation in the next 30 days.

Description

The trim-newlines package before 3.0.1 and 4.x before 4.0.1 for Node.js has an issue related to regular expression denial-of-service (ReDoS) for the .end() method.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

2.85%

84.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Trim-Newlines Project	Trim-Newlines	< 3.0.1
Trim-Newlines Project	Trim-Newlines	>= 4.0.0, < 4.0.1
Netapp	E-Series Performance Analyzer	All versions
Debian	Debian Linux	10.0

References

https://github.com/sindresorhus/trim-newlines/releases/tag/v4.0.1Patch, Release Notes
https://lists.debian.org/debian-lts-announce/2022/12/msg00033.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210702-0007/Third Party Advisory
https://www.npmjs.com/package/trim-newlinesProduct
https://github.com/sindresorhus/trim-newlines/releases/tag/v4.0.1Patch, Release Notes
https://lists.debian.org/debian-lts-announce/2022/12/msg00033.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20210702-0007/Third Party Advisory
https://www.npmjs.com/package/trim-newlinesProduct

Timeline

Published: May 28, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-33623?

The trim-newlines package before 3.0.1 and 4.x before 4.0.1 for Node.js has an issue related to regular expression denial-of-service (ReDoS) for the .end() method.

How severe is CVE-2021-33623?

CVE-2021-33623 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 2.85% probability of exploitation in the next 30 days.

How do I fix CVE-2021-33623?

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-2021-33623?

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

Scan your code now

Source: NVD / NIST