Medium severity6.5NVD Advisory· Published May 6, 2025· Updated Apr 15, 2026

CVE-2025-37730

Description

Improper certificate validation in Logstash's TCP output could lead to a man-in-the-middle (MitM) attack in “client” mode, as hostname verification in TCP output was not being performed when the ssl_verification_mode => full was set.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

RubyGems/Logstash Output TCPinferred
Package: https://rubygems.org/gems/logstash-output-tcp
Elastic/Logstashllm-fuzzy
Range: >= 8.0.0, < 8.17.6, >= 9.0.0, < 9.0.1
osv-coords
pkg:bitnami/logstash
Range: >= 8.0.0, < 8.18.1

Patches

Vulnerability mechanics

References

discuss.elastic.co/t/logstash-8-17-6-8-18-1-and-9-0-1-security-update-esa-2025-08/377869nvd

News mentions

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cvss	0.423
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000