How severe is CVE-2025-37727?

CVE-2025-37727 has a CVSS 3.x base score of 5.7, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2025-37727 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-37727?

CVE-2025-37727 affects Elastic Elasticsearch. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-37727?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-37727 have an EU (EUVD) identifier?

Yes. CVE-2025-37727 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-33703.

When was CVE-2025-37727 published?

CVE-2025-37727 was published on 2025-10-10 and last updated on 2026-06-17.

CVE-2025-37727

CVE-2025-37727 is a medium-severity vulnerability in Elastic Elasticsearch with a CVSS 3.x base score of 5.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-532.

Key facts

Severity: Medium (CVSS 3.x base score 5.7)
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-33703
Weakness: CWE-532
Affected product: Elastic Elasticsearch
Published: 2025-10-10
Last modified: 2026-06-17

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

Frequently asked questions

What is CVE-2025-37727?: 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
How severe is CVE-2025-37727?: CVE-2025-37727 has a CVSS 3.x base score of 5.7, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-37727 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-37727?: CVE-2025-37727 affects Elastic Elasticsearch. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-37727?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-37727 have an EU (EUVD) identifier?: Yes. CVE-2025-37727 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-33703.
When was CVE-2025-37727 published?: CVE-2025-37727 was published on 2025-10-10 and last updated on 2026-06-17.

References

https://discuss.elastic.co/t/elasticsearch-8-18-8-8-19-5-9-0-8-9-1-5-security-update-esa-2025-18/382453

Affected products (1)

cpe:2.3:a:elastic:elasticsearch:*:*:*:*:*:*:*:*

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Threat intelligence

Threat-intel indicators referencing this CVE:

115.190.127.7 (ipv4-addr)
129.204.154.232 (ipv4-addr)
150.158.196.236 (ipv4-addr)