CVE-2025-37730 — Improper Certificate Validation in Logstash

CWE-295 — Improper Certificate Validation3 documents3 sources
Severity
6.5MEDIUMNVD
EPSS
0.1%
top 74.47%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Elastic Logstash
Timeline
PublishedMay 6

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 vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:NExploitability: 2.2 | Impact: 4.2

Affected Packages1 packages

▶CVEListV5elastic/logstash8.0.0 — 8.17.6+2

🔴Vulnerability Details

2
GHSA
GHSA-qrf7-ph5v-mj2v: 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↗2025-05-06
▶
CVEList
Logstash Improper Certificate Validation in TCP output↗2025-05-06
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CVE-2025-37730 — Improper Certificate Validation | cvebase