CVE-2023-53689: Nagios Fusion versions prior to 4.2.0 contain a reflected cross-site scripting (XSS) vulnerability in the license key…
CVE-2023-53689 · Severity: medium · CVSS 4.8 · Published 2025-10-30
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.
No. Junglewise Threat Intelligence has no report of CVE-2023-53689 being exploited in the wild.
How severe is CVE-2023-53689?
Medium severity, with a CVSS score of 4.8, published 30 October 2025.
Which products and versions are affected?
Nagios Fusion. The advisory does not name versions.
Is there a fix for CVE-2023-53689?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2023-53689?
Check whether you run Nagios Fusion. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.