CVE-2025-37731: Elasticsearch Improper Authentication

Published Dec 15, 2025
·
Updated

Improper Authentication in Elasticsearch PKI realm can lead to user impersonation via specially crafted client certificates. A malicious actor would need to have such a crafted client certificate signed by a legitimate, trusted Certificate Authority.

Affected Software

10 affected componentsFixes available
Elastic Elasticsearch
Microsoft cbl2 rubygem-elasticsearch 8.3.0-1
Microsoft azl3 rubygem-elasticsearch 8.9.0-1
maven/org.elasticsearch:elasticsearch>=9.2.0<9.2.2
9.2.2
maven/org.elasticsearch:elasticsearch>=9.0.0-beta1<9.1.8
9.1.8
maven/org.elasticsearch:elasticsearch>=7.0.0-alpha1<8.19.8
8.19.8
Elastic Elasticsearch>=7.0.0<=7.17.29
Elastic Elasticsearch>=8.0.0<8.19.8
Elastic Elasticsearch>=9.0.0<9.1.8
Elastic Elasticsearch>=9.2.0<9.2.2

Event History

Dec 15, 2025
CVE Published
via MITRE·10:42 AM
Data Sourced
via MITRE·10:42 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·11:15 AM
DescriptionSeverityWeaknessAffected Software
Advisory Published
via GitHub·12:30 PM
Data Sourced
via GitHub·12:30 PM
DescriptionSeverityWeaknessAffected Software
Dec 16, 2025
Data Sourced
via Microsoft·01:01 AM
DescriptionSeverityWeaknessAffected Software
Updated
via Microsoft·01:01 AM
Affected Software

Frequently Asked Questions

1

What is the severity of CVE-2025-37731?

CVE-2025-37731 is considered a high severity vulnerability due to the potential for user impersonation.

2

How do I fix CVE-2025-37731?

To mitigate CVE-2025-37731, ensure that your Elasticsearch installation is updated to the latest version with the security patches applied.

3

What type of systems are affected by CVE-2025-37731?

CVE-2025-37731 affects Elasticsearch systems using the PKI realm for authentication.

4

Who can exploit CVE-2025-37731?

A malicious actor with a specially crafted client certificate signed by a trusted Certificate Authority can exploit CVE-2025-37731.

5

What is the impact of CVE-2025-37731?

The impact of CVE-2025-37731 includes potential unauthorized user access and impersonation within Elasticsearch systems.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203