Security readout for executives and security teams
Plain-English summary
mongo-express can crash when an authenticated, high-privilege user exports an empty collection as CSV. The business impact is service availability: an exposed admin interface could be knocked offline, disrupting database administration workflows. The provided sources do not identify data theft, data modification, active exploitation, or a named patch.
Executive priority
Treat this as a moderate availability risk for environments that expose mongo-express. It is not described as data compromise, but an outage of an admin tool can affect operations. Prioritize internet-facing or broadly accessible deployments first.
Technical view
CVE-2021-23372 is a denial-of-service flaw in mongo-express caused by an unhandled exception during CSV export of an empty collection. CVSS 3.1 is 4.4 with network attack vector, high attack complexity, high privileges required, no user interaction, and high availability impact only.
Likely exposure
Exposure is most relevant where mongo-express is deployed and reachable by users with privileged access to the interface. Internet-accessible admin consoles raise concern, but the source data indicates high privileges and high attack complexity are required.
Exploitation context
The provided bundle marks KEV as false, and no cited source states active exploitation. The known trigger is a CSV export path involving an empty collection, resulting in application crash rather than confidentiality or integrity impact.
Researcher notes
The evidence identifies package-level impact and a specific crash condition, but does not provide CWE, exploit-in-the-wild evidence, or a confirmed fixed version in the supplied bundle. Validation should remain defensive and focus on inventory, access control, logs, and vendor advisories.
Mitigation direction
- Restrict mongo-express access to trusted administrators and private networks.
- Review vendor or package guidance for any fixed release or workaround.
- Avoid exposing mongo-express directly to the internet.
- Monitor application crashes around CSV export workflows.
- Prioritize removal or replacement if no maintained fix is available.
Validation and detection
- Inventory all environments running mongo-express.
- Confirm whether mongo-express is externally reachable or VPN-restricted.
- Check which users can perform CSV export actions.
- Review logs for crashes linked to CSV export activity.
- Track package version and compare against vendor guidance.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CVE-2021-23372 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H0.73.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.4MediumVector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://snyk.io/vuln/SNYK-JS-MONGOEXPRESS-1085403CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.