CVE-2025-37731
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-15

Last updated on: 2025-12-18

Assigner: Elastic

Description
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.
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Meta Information
Published
2025-12-15
Last Modified
2025-12-18
Generated
2026-06-16
AI Q&A
2025-12-15
EPSS Evaluated
2026-06-15
NVD
CVE-2025-37731
Affected Vendors & Products
Showing 4 associated CPEs
Vendor Product Version / Range
elastic elasticsearch From 7.0.0 (inc) to 7.17.29 (inc)
elastic elasticsearch From 8.0.0 (inc) to 8.19.8 (exc)
elastic elasticsearch From 9.0.0 (inc) to 9.1.8 (exc)
elastic elasticsearch From 9.2.0 (inc) to 9.2.2 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-NVD-CWE-noinfo
CWE-287 When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
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Executive Summary

CVE-2025-37731 is an improper authentication vulnerability in the Elasticsearch PKI realm. It allows an attacker to impersonate users by using specially crafted client certificates. However, the attacker must have a malicious client certificate that is signed by a legitimate, trusted Certificate Authority to exploit this issue. [1]

Impact Analysis

This vulnerability can lead to user impersonation, meaning an attacker could gain unauthorized access to Elasticsearch systems by presenting a crafted client certificate. This could compromise the confidentiality and integrity of data within Elasticsearch, potentially allowing unauthorized data access or manipulation. [1]

Compliance Impact

The provided resources do not specify how this vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

Mitigation Strategies

The immediate step to mitigate this vulnerability is to upgrade Elasticsearch to a fixed version: 8.19.8, 9.1.8, or 9.2.2. There are no workarounds available for users unable to upgrade. [1]

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