CVE-2023-53689 Nagios Fusion < 4.2.0 License Information Reflected XSS
Reflected XSS in Nagios Fusion allows attackers to execute scripts in user browsers, potentially stealing credentials or performing unauthorized administrative actions.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2023-53689?
CVE-2023-53689 is a medium-severity cross-site scripting vulnerability in Nagios Fusion, published on 30 Oct 2025. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2023-53689?
It affects 1 product.
Products include Nagios Fusion.
How do I fix CVE-2023-53689?
No fix has been published for CVE-2023-53689 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2023-53689 being exploited?
There is no known exploitation of CVE-2023-53689 in the wild and no public exploit code.
Other vulnerabilities in Nagios Fusion
Sources
Also known as GHSA-hfcv-97wg-h7wr.