CVE-2025-37730 — MEDIUM (6.5)

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.

CVSS Score

6.5

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

LOW

Availability

NONE

Related Weaknesses (CWE)

CWE-295

References

https://discuss.elastic.co/t/logstash-8-17-6-8-18-1-and-9-0-1-security-update-es

FAQ

What is CVE-2025-37730?

CVE-2025-37730 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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_v...

How severe is CVE-2025-37730?

CVE-2025-37730 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-37730?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.