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Elasticsearch: Insertion of Sensitive Information into Log File via reindex API

Moderate severity GitHub Reviewed Published Oct 10, 2025 to the GitHub Advisory Database • Updated Oct 11, 2025

Package

maven org.elasticsearch:elasticsearch (Maven)

Affected versions

>= 7.0.0, < 8.18.8
>= 8.19.0, < 8.19.5
>= 9.0.0-beta1, < 9.0.8
>= 9.1.0, < 9.1.5

Patched versions

8.18.8
8.19.5
9.0.8
9.1.5

Description

Insertion of sensitive information in log file in Elasticsearch can lead to loss of confidentiality under specific preconditions when auditing requests to the reindex API https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-reindex

References

Published by the National Vulnerability Database Oct 10, 2025
Published to the GitHub Advisory Database Oct 10, 2025
Reviewed Oct 11, 2025
Last updated Oct 11, 2025

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Adjacent
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(3rd percentile)

Weaknesses

Insertion of Sensitive Information into Log File

Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information. Learn more on MITRE.

CVE ID

CVE-2025-37727

GHSA ID

GHSA-56r7-h6mw-rcfv

Source code

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