How severe is CVE-2023-53689?

CVE-2023-53689 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2023-53689 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-53689?

CVE-2023-53689 affects Nagios Fusion. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-53689?

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

Does CVE-2023-53689 have an EU (EUVD) identifier?

Yes. CVE-2023-53689 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-60051.

When was CVE-2023-53689 published?

CVE-2023-53689 was published on 2025-10-30 and last updated on 2026-06-17.

CVE-2023-53689

CVE-2023-53689 is a medium-severity vulnerability in Nagios Fusion with a CVSS 3.x base score of 4.8. 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 4.8)
CVSS v4: 6.0
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-60051
Weakness: CWE-79
Affected product: Nagios Fusion
Published: 2025-10-30
Last modified: 2026-06-17

Description

Nagios Fusion versions prior to 4.2.0 contain a reflected cross-site scripting (XSS) vulnerability in the license key configuration flow that can result in execution of attacker-controlled script in the browser of a user who follows a crafted URL. While the application server itself is not directly corrupted by the reflected XSS, the resulting browser compromise can lead to credential/session theft and unauthorized administrative actions.

Frequently asked questions

What is CVE-2023-53689?: Nagios Fusion versions prior to 4.2.0 contain a reflected cross-site scripting (XSS) vulnerability in the license key configuration flow that can result in execution of attacker-controlled script in the browser of a user who follows a crafted URL. While the application server itself is not directly corrupted by the reflected XSS, the resulting browser compromise can lead to credential/session theft and unauthorized administrative actions.
How severe is CVE-2023-53689?: CVE-2023-53689 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2023-53689 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-53689?: CVE-2023-53689 affects Nagios Fusion. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-53689?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-53689 have an EU (EUVD) identifier?: Yes. CVE-2023-53689 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-60051.
When was CVE-2023-53689 published?: CVE-2023-53689 was published on 2025-10-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nagios:fusion:*:*:*:*:*:*:*:*

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