Is CVE-2025-37731 in the CISA KEV catalog?

No. CVE-2025-37731 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-37731?

CVE-2025-37731 has a CVSS v3 base score of 6.8 (Moderate).

What is the EPSS score for CVE-2025-37731?

CVE-2025-37731 has an EPSS score of 0.16% (6th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-37731?

Upgrade Elasticsearch to 8.19.8 or later.

CVE & CISA-KEV Catalog

CVE-2025-37731

MEDIUM

6.8

CVSS v3

NVD

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.

CWE-287Improper Authentication

How to fix

Remediation Available

ElasticsearchWindows application

Affected:8.0.0 8.19.8Fixed in:8.19.8Elastic

Affected:9.0.0 9.1.8Fixed in:9.1.8Elastic

Affected:9.2.0 9.2.2Fixed in:9.2.2Elastic

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.16%probability of exploitation in 30 days

6thpercentile

Low risk: more likely to be exploited than 6% of all known CVEs.

References

Vendor Advisory1

discuss.elastic.co

Related Vulnerabilities

Other CWE-287 (Improper Authentication) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-35082	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-35078	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2017-7921	Critical	9.8	100%	KEV	-
CVE-2024-7593	Critical	9.8	100%	KEV	-
CVE-2023-46805	High	8.2	100%	KEV + Ransom	-
CVE-2022-40684	Critical	9.8	100%	KEV + Ransom	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-12-18.