How severe is CVE-2025-34278?

CVE-2025-34278 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2025-34278 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-34278?

CVE-2025-34278 affects Nagios Network Analyzer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-34278?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-34278 have an EU (EUVD) identifier?

Yes. CVE-2025-34278 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-37215.

When was CVE-2025-34278 published?

CVE-2025-34278 was published on 2025-10-30 and last updated on 2026-06-17.

CVE-2025-34278

CVE-2025-34278 is a medium-severity vulnerability in Nagios Network Analyzer with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v4: 5.1
EPSS exploit prediction: 1% (48th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-37215
Weakness: CWE-79
Affected product: Nagios Network Analyzer
Published: 2025-10-30
Last modified: 2026-06-17

Description

Nagios Network Analyzer versions prior to 2024R1 contain a stored cross-site scripting (XSS) vulnerability in the Source Groups page (percentile calculator menu). An attacker can supply a malicious payload which is stored by the application and later rendered in the context of other users. When a victim views the affected page the injected script executes in the victim's browser context.

Frequently asked questions

What is CVE-2025-34278?: Nagios Network Analyzer versions prior to 2024R1 contain a stored cross-site scripting (XSS) vulnerability in the Source Groups page (percentile calculator menu). An attacker can supply a malicious payload which is stored by the application and later rendered in the context of other users. When a victim views the affected page the injected script executes in the victim's browser context.
How severe is CVE-2025-34278?: CVE-2025-34278 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2025-34278 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (48th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-34278?: CVE-2025-34278 affects Nagios Network Analyzer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-34278?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-34278 have an EU (EUVD) identifier?: Yes. CVE-2025-34278 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-37215.
When was CVE-2025-34278 published?: CVE-2025-34278 was published on 2025-10-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nagios:network_analyzer:*:*:*:*:*:*:*:*

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