Improper authentication in Elasticsearch - CVE-2025-37731

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Main Vulnerability Database Vulnerabilities #VU119962

Improper authentication in Elasticsearch - CVE-2025-37731

Published: December 15, 2025


Vulnerability identifier: #VU119962
CSH Severity: Medium
CVSS v4: 7.6 [CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-37731
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote user to bypass authentication process.

The vulnerability exists due to an error in Elasticsearch PKI realm when handling client certificates. A remote user can use a specially crafted certificate to impersonate other application users. 


Affected software

Elasticsearch
IBM Watson Discovery for IBM Cloud Pak for Data

How to mitigate CVE-2025-37731

Install updates from vendor's website.

Elasticsearch - addressed in versions 8.19.8, 9.1.8, 9.2.2
IBM Watson Discovery for IBM Cloud Pak for Data - update to 5.3.1

External References

Related Security Bulletins