Critical severity · published Oct 30, 2025
CVE-2025-34271
Nagios Log Server < 2024R2.0.2 Cluster Manager Credential Requests Sent Over Plaintext
9.8
CVSS
0.7%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 55% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LS
Log Server · Nagios
before 2024R2.0.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-34271
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-34271
Release Notes
https://www.nagios.com/changelog/#log-server
Vendor Advisory
https://www.nagios.com/products/security/#log-server-2024R2
Third Party Advisory
https://www.vulncheck.com/advisories/nagios-log-server-cluster-manager-credential-requests-sent-over-plaintext
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