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Vulnerability DatabaseCVE-2021-33177

CVE-2021-33177: 
Nagios XI vulnerability analysis and mitigation

Overview

The Bulk Modifications functionality in Nagios XI versions prior to 5.8.5 is vulnerable to SQL injection. This vulnerability, identified as CVE-2021-33177, requires authentication to the vulnerable system, but once authenticated, attackers can execute arbitrary SQL queries (Synopsys Blog).

Technical details

The vulnerability affects the bulk modifications tool in Nagios XI and allows an authenticated user to inject arbitrary SQL into an UPDATE statement. In the default configuration, this enables the execution of arbitrary PostgreSQL functions. The vulnerability has been assigned a CVSS 3.1 base score of 5.2 (medium) with the vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:L/A:N/E:P/RL:O/RC:C (Synopsys Blog).

Impact

When exploited, this vulnerability allows authenticated users with access to the bulk modifications tool to execute arbitrary SQL queries, potentially leading to unauthorized access to sensitive data or manipulation of the database (NVD).

Mitigation and workarounds

The recommended mitigation is to upgrade to Nagios XI version 5.8.5 or later. The vulnerability was fixed in the July 15, 2021 release of Nagios XI version 5.8.5 (Synopsys Blog).

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

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  • Nagios XINagios XI
  • cpe:2.3:a:nagios:nagios_xi
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  • Nagios XINagios XI
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NoNoNov 03, 2025

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