CVE-2021-23372Network attack vector

Service crash via empty CSV export

Published Apr 13, 2021 · Updated Sep 16, 2024

Denial of service in mongo-express before 1.0.1 allows remote authenticated users to crash the service by exporting an empty collection as CSV. The CSV export path fails to handle an empty collection result and lets the resulting exception escape the request handler. Access to the administrative web interface and an empty MongoDB collection are required; the bounded consequence is a process crash.

CVSS severity4.4
Medium
EPSS probability0.88%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in mongo-express before 1.0.1 allows remote authenticated users to crash the service by exporting an empty collection as CSV. The CSV export path fails to handle an empty collection result and lets the resulting exception escape the request handler. Access to the administrative web interface and an empty MongoDB collection are required; the bounded consequence is a process crash.

The record

CVE
CVE-2021-23372
Published
Apr 13, 2021
Updated
Sep 16, 2024
Vendor
mongo-express
Product
mongo-express
Classifications
CWE-754, T1499.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 13, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <unspecified

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

mongo-express · mongo-expressversion=0 <unspecified

Published CVSS scores

4.4SnykCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-754Improper Check for Unusual or Exceptional Conditions
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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