Improper Authentication in Elasticsearch by Elastic
CVE-2025-37731

6.8MEDIUM

Key Information:

Vendor

Elastic
Status
Elastic
Vendor
CVE Published:
15 December 2025

What is CVE-2025-37731?

The improper authentication issue present in Elasticsearch's PKI realm enables potential user impersonation. This vulnerability allows an attacker with a specially crafted client certificate—if signed by a legitimate, trusted Certificate Authority—to impersonate users within the system. This can lead to unauthorized access and control over user accounts, posing significant security risks to organizations relying on Elasticsearch for their data storage and management needs.

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Affected Version(s)

Elasticsearch 7.0.0 <= 7.17.29

Elasticsearch 8.0.0 <= 8.19.7

Elasticsearch 9.0.0 <= 9.1.7

References

https://discuss.elastic.co/t/elasticsearch-8-19-8-9-1-8-a...

CVSS V3.1

Score:
6.8
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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