Improper certificate validation in Logstash - CVE-2025-37730
Published: May 6, 2025
Vulnerability identifier: #VU108738
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-37730
CWE-ID: CWE-295
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform MitM attack.
The vulnerability exists due to missing certificate validation in TCP output in the client mode when "ssl_verification_mode = full" is set. A remote attacker with ability to intercept traffic can perform MitM attack.
Affected software
Logstash
How to mitigate CVE-2025-37730
Install updates from vendor's website.
Logstash - addressed in versions 8.17.6, 8.18.1, 9.0.1