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Vulnerability DatabaseCVE-2021-47698

CVE-2021-47698: 
Nagios XI vulnerability analysis and mitigation

Overview

Nagios XI versions prior to 5.8.7 using embedded Nagios Core are vulnerable to cross-site scripting (XSS) via the Core UI's Views URL handling. The vulnerability was disclosed on November 3, 2025 and assigned identifier CVE-2021-47698 (AttackerKB, VulnCheck).

Technical details

The vulnerability stems from insufficient validation or escaping of user-supplied input in the Views URL handling functionality of the Nagios Core UI embedded within Nagios XI. This implementation flaw could allow injection and execution of arbitrary scripts. The vulnerability has been assigned a CVSS v4.0 Base Score of 5.1 (Medium) with the vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N (VulnCheck).

Impact

If successfully exploited, this vulnerability allows an attacker to inject and execute arbitrary JavaScript code in the context of a victim's browser session. This could potentially lead to theft of sensitive information, session hijacking, or other client-side attacks (VulnCheck).

Mitigation and workarounds

The recommended mitigation is to upgrade Nagios XI to version 5.8.7 or later which contains fixes for this vulnerability (Nagios Changelog).

Additional resources

Source: This report was generated using AI

Related Nagios XI vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2024-13997CRITICAL9.4
  • Nagios XINagios XI
  • cpe:2.3:a:nagios:nagios_xi
NoNoNov 03, 2025
CVE-2025-34288HIGH8.6
  • Nagios XINagios XI
  • cpe:2.3:a:nagios:nagios_xi
NoNoDec 16, 2025
CVE-2024-13998MEDIUM6
  • Nagios XINagios XI
  • cpe:2.3:a:nagios:nagios_xi
NoNoNov 03, 2025
CVE-2021-47698MEDIUM5.1
  • Nagios XINagios XI
  • cpe:2.3:a:nagios:nagios_xi
NoYesNov 03, 2025
CVE-2016-15054N/AN/A
  • Nagios XINagios XI
  • cpe:2.3:a:nagios:nagios_xi
NoYesNov 03, 2025

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