CVE-2021-37940Network attack vector

Information disclosure via GHES integration SSRF

Published Dec 7, 2021 · Updated Aug 4, 2024

Server-side request forgery in Elastic Enterprise Search Workplace Search through 7.15.2 allows remote authenticated admins to view internal hosts. The GitHub Enterprise Server integration issues GET requests to attacker-selected hosts and exposes their responses. Administrator access to the Workplace Search integration is required, and the demonstrated consequence is disclosure of otherwise non-public host content without integrity or availability impact.

CVSS severity6.8
Medium
EPSS probability0.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Server-side request forgery in Elastic Enterprise Search Workplace Search through 7.15.2 allows remote authenticated admins to view internal hosts. The GitHub Enterprise Server integration issues GET requests to attacker-selected hosts and exposes their responses. Administrator access to the Workplace Search integration is required, and the demonstrated consequence is disclosure of otherwise non-public host content without integrity or availability impact.

The record

CVE
CVE-2021-37940
Published
Dec 7, 2021
Updated
Aug 4, 2024
Vendor
Elastic
Product
Elastic Enterprise Search
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 7, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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=before 7.16.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Elastic · Elastic Enterprise Searchversion=before 7.16.0

Published CVSS scores

4.0NVDAV:N/AC:L/Au:S/C:P/I:N/A:N
6.8NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

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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