CVE-2023-53689 MEDIUM

CVE-2023-53689: Nagios Fusion < 4.2.0 License Information Reflected XSS

Vendor Nagios
Product Fusion
Weakness CWE-79 · XSS
Published October 30, 2025
Last update November 17, 2025

CVSS base score

6.0/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

October 30, 2025 CVE published
November 17, 2025 Record updated