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Status published
Medium
CVE-2025-37730
Logstash Improper Certificate Validation in TCP output
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
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Affected Vendor
Elastic
View all reports →Affected Software
Logstash
Vulnerable Versions:
8.0.0, 8.18.0, 9.0.0
Timeline
Official Publish:
May 6th, 2025
Last Modified:
May 6th, 2025
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N