CVE-2025-37731

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.

CVSS v3.1 Score

6.8

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Weakness Type (CWE)

CWE-287 Improper Authentication

Affected Products

Vendor	Product	Versions
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

References

Advisories & Patches

https://discuss.elastic.co/t/elasticsearch-8-19-8-9-1-8-and-9-2-2-security-update-esa-2025-27/384063

Frequently Asked Questions

What is CVE-2025-37731? +

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. It has a CVSS v3.1 base score of 6.8 (MEDIUM).

How severe is CVE-2025-37731? +

CVE-2025-37731 has a CVSS v3.1 score of 6.8 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-37731? +

CVE-2025-37731 affects products from elastic, specifically: elasticsearch. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-37731? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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