What is CVE-2021-23372?

CVE-2021-23372 is a medium-severity vulnerability in Mongo-Express Project, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 4.4/10. Published 2021-04-13.

How severe is CVE-2021-23372?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Vulnerability in Mongo-Express Project

CVE-2021-23372

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.

Published 2021-04-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.009 (57.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Mongo-Express Project
Mongo-Express — versions 0

Weakness classification (CWE)

CWE-754 — Improper Check for Unusual or Exceptional Conditions

References

snyk.io/vuln/SNYK-JS-MONGOEXPRESS-1085403 (Third Party Advisory)

Frequently asked questions

What is CVE-2021-23372?: CVE-2021-23372 is a medium-severity vulnerability in Mongo-Express Project, classified under Improper Check for Unusual or Exceptional Conditions. CVSS score: 4.4/10. Published 2021-04-13.
How severe is CVE-2021-23372?: Medium severity. CVSS v3 base score is 4.4 out of 10.