CVE-2021-37351
Nagios XI vulnerability analysis and mitigation

Overview

Nagios XI before version 5.8.5 is vulnerable to insecure permissions that allows unauthenticated users to access guarded pages through a crafted HTTP request to the server (NVD, Hacker News).

Technical details

The vulnerability has been assigned a CVSS v3.1 Base Score of 5.3 MEDIUM (Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N). The issue is related to incorrect default permissions (CWE-276) that allow unauthorized access to protected pages (NVD).

Impact

The vulnerability allows unauthenticated attackers to access protected pages that should require authentication, potentially exposing sensitive information (Hacker News).

Mitigation and workarounds

The vulnerability has been fixed in Nagios XI version 5.8.5. Users are advised to upgrade to this version or later to address the security issue (Nagios Changelog).

Additional resources


SourceThis 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-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-2024-13992MEDIUM5.1
  • Nagios XINagios XI
  • cpe:2.3:a:nagios:nagios_xi
NoNoOct 31, 2025
CVE-2016-15054N/AN/A
  • Nagios XINagios XI
  • cpe:2.3:a:nagios:nagios_xi
NoYesNov 03, 2025

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