CVE-2025-34271 HIGH

CVE-2025-34271: Nagios Log Server < 2024R2.0.2 Cluster Manager Credential Requests Sent Over Plaintext

Vendor Nagios
Product Log Server
Weakness CWE-319 · Cleartext transmission
Published October 30, 2025
Last update November 17, 2025

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

Nagios Log Server versions prior to 2024R2.0.2 contain a vulnerability in the cluster manager component when requesting sensitive credentials from peer nodes over an unencrypted channel even when SSL/TLS is enabled in the product configuration. As a result, an attacker positioned on the network path can intercept credentials in transit. Captured credentials could allow the attacker to authenticate as a cluster node or service account, enabling further unauthorized access, lateral movement, or system compromise.

Key dates

02Disclosure timeline

October 30, 2025 CVE published
November 17, 2025 Record updated