CVE-2020-36859 in Nagios
Summary
by MITRE • 10/31/2025
The Core Config Manager (CCM) in Nagios XI versions prior to CCM 3.0.7 / Nagios XI 5.7.4 contains multiple SQL injection vulnerabilities in the object edit pages. Unsanitized user-supplied input was incorporated into SQL queries used by configuration object editors, allowing authenticated users to inject SQL fragments. Successful exploitation could lead to unauthorized disclosure or modification of configuration and application data, and in some environments could allow further compromise of the application or backend database.
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Analysis
by VulDB Data Team • 11/08/2025
The vulnerability identified as CVE-2020-36859 affects the Core Config Manager component within Nagios XI platforms prior to versions CCM 3.0.7 and Nagios XI 5.7.4. This represents a critical security flaw that undermines the integrity of configuration management systems. The vulnerability stems from improper input validation mechanisms within the object edit pages that handle configuration objects. The affected system processes user-supplied data without adequate sanitization before incorporating it into SQL queries, creating an environment where malicious actors can manipulate database operations through carefully crafted inputs.
The technical implementation of this vulnerability manifests through SQL injection vectors that exploit the lack of proper parameterization in database query construction. When authenticated users submit data through the configuration object editors, the system fails to validate or sanitize the input parameters before executing SQL commands. This flaw aligns with CWE-89 which categorizes SQL injection vulnerabilities as weaknesses in software that allows attackers to manipulate database queries through untrusted input. The vulnerability specifically impacts the configuration object editing functionality where user input directly influences SQL statement composition, enabling attackers to inject malicious SQL fragments that can alter or extract sensitive data.
The operational impact of this vulnerability extends beyond simple data exposure to potentially enable complete system compromise. Successful exploitation allows authenticated users to access, modify, or delete configuration data that governs the monitoring system's behavior and security posture. In environments where Nagios XI serves as a critical infrastructure monitoring solution, this vulnerability could enable attackers to disable security alerts, modify monitoring parameters, or extract sensitive operational data. The attack surface is particularly concerning because it affects the configuration management layer, which controls how monitoring systems operate and respond to security events. According to ATT&CK framework category T1078, this vulnerability could facilitate unauthorized access and persistence within the monitored environment, potentially allowing attackers to maintain control over the monitoring infrastructure.
Mitigation strategies for CVE-2020-36859 require immediate implementation of software updates to versions CCM 3.0.7 and Nagios XI 5.7.4 where the SQL injection vulnerabilities have been addressed. Organizations should also implement additional defensive measures including input validation controls, parameterized query implementations, and comprehensive access controls for configuration management interfaces. Network segmentation and monitoring of configuration change activities can help detect unauthorized modifications. Security teams should conduct thorough vulnerability assessments to identify any potential exploitation attempts and implement database query auditing to track SQL execution patterns. The remediation process must include comprehensive testing to ensure that the patch does not introduce compatibility issues with existing monitoring configurations while maintaining the integrity of the security controls that protect the monitoring infrastructure.