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CVE-2025-34274

Nagios Log Server privilege escalation

9.8 CRITICALEPSS 2.08%
  1. Published30 Oct 2025

Description

Nagios Log Server versions prior to 2024R2.0.3 contain an execution with unnecessary privileges vulnerability as it runs its embedded Logstash process as the root user. If an attacker is able to compromise the Logstash process - for example by exploiting an insecure plugin, pipeline configuration injection, or a vulnerability in input parsing - the attacker could execute code with root privileges, resulting in full system compromise. The Logstash service has been altered to run as the lower-privileged 'nagios' user to reduce this risk associated with a network-facing service that can accept untrusted input or load third-party components.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Nagios Log Server< 2024 · 2024

Remediation

Fixed in
Nagios Log Server≥ 2024

References

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Frequently asked

Is CVE-2025-34274 being actively exploited?

CVE-2025-34274 is not in the CISA KEV catalog. Its EPSS exploit probability is 2.08%.

How severe is CVE-2025-34274?

CVE-2025-34274 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 2.08% probability of exploitation.

Which products are affected by CVE-2025-34274?

Affected products include Nagios Log Server.

How do I fix CVE-2025-34274?

Upgrade affected software to a fixed version, for example Nagios Log Server 2024 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-34274 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.