CVE-2023-53689

Nagios Fusion < 4.2.0 License Information Reflected XSS

Published Oct 30, 2025 CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Solution

Nagios addresses this vulnerability as "Reflected XSS when configuring a license key," and "Fixed XSS in Admin->License Information."

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:nagios:fusion:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Nagios
Nagios fusion
Vendors & Products Nagios
Nagios fusion
Type Values Removed Values Added
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.
Title Nagios Fusion < 4.2.0 License Information Reflected XSS
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 6, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 17, 2025, 9:36 PM
Reserved
Oct 17, 2025, 3:49 PM
Status
Analyzed
Published
Oct 30, 2025, 10:15 PM
Modified
Oct 18, 2026, 12:10 AM