ClickCease Nagios XI Network Monitoring Software Flaws Exposed

Nagios XI Network Monitoring Software Flaws Exposed

Wajahat Raja

October 2, 2023 - TuxCare expert team

A number of Nagios XI network monitoring software flaws have recently been discovered. These flaws have the potential to result in privilege escalation and data disclosure. Nagios XI is a popular monitoring tool for essential infrastructure components such as applications, services, operating systems, network protocols, system metrics, and network architecture. This blog looks into the specifics of these flaws, their potential consequences, and the efforts taken to rectify them.


Nagios XI Flaws Exposed


Four security flaws were detected and monitored using CVE numbers. The Nagios XI security vulnerabilities affect Nagios XI versions 5.11.1 and lower, although they have been appropriately notified. It was also said that these will be addressed with the release of version 5.11.2 on September 11, 2023.


CVE-2023-40931: SQL Injection in Banner Acknowledging Endpoint


This vulnerability allows users with varied levels of privilege to use SQL injections to get access to database fields. The information received as a result of this vulnerability might be used to escalate privileges within the product and get access to sensitive user information such as password hashes and API tokens.


CVE-2023-40932: Cross-Site Scripting (XSS) in Custom Logo Component


The cross-site scripting bug CVE-2023-40932 was discovered in the Custom Logo component. This vulnerability might be used to access sensitive data from the login page, including unencrypted passwords, providing a severe security risk.


CVE-2023-40933: SQL Injection in Announcement Banner Settings


This vulnerability, like CVE-2023-40931, includes SQL injection, allowing users to gain unauthorized access to database fields. Exploiting this vulnerability could result in additional privilege escalation and the unauthorized retrieval of sensitive user data.


CVE-2023-40934: SQL Injection in Host/Service Escalation in the Core Configuration Manager (CCM)


Another SQL injection vulnerability, CVE-2023-40934, particularly affects the Host/Service Escalation component in the Core Configuration Manager. This vulnerability, like the others, poses a risk of privilege escalation and unauthorized data access.


Expert Insights On Nagios XI Network Monitoring Software Flaws


Outpost24 researcher Astrid Tedenbrant was the one who offered vital insight into these Nagios XI network monitoring vulnerabilities: Three of these flaws (CVE-2023-40931, CVE-2023-40933, and CVE-2023-40934) allow users with varying levels of privilege to access database fields via SQL Injections.” 


The information gained from these Nagios XI software vulnerabilities might be used to elevate product privileges and get sensitive user data such as password hashes and API tokens. The fourth vulnerability (CVE-2023-40932) permits Cross-Site Scripting using the Custom Logo component, which appears on all pages, including the login page. This can be used to read and change page data, such as login form plain-text passwords.

Potential Impact


An authorized attacker could execute arbitrary SQL commands if the three SQL injection vulnerabilities are successfully exploited. The XSS vulnerability (CVE-2023-40932), on the other hand, might be used to inject arbitrary JavaScript, potentially allowing attackers to view and change page data, including unencrypted passwords from login forms. The gravity of these flaws cannot be overstated, as they could have catastrophic ramifications for organizations that rely on Nagios XI for network monitoring.

Past Incidents


It’s worth mentioning that this isn’t the first time Nagios XI has been found to have security flaws. Skylight Cyber and Claroty security experts discovered up to two dozen problems in the software in September 2021. These flaws had the potential to be exploited for infrastructure hijacking and remote code execution.

Protecting Your Network


Given these Nagios XI security issues, it is critical that organizations employing Nagios XI take urgent action. It is critical to upgrade to the most recently patched version, 5.11.2, in order to mitigate the risks associated with these vulnerabilities. Lastly, to maintain the integrity of their monitoring systems, organizations should conduct extensive security evaluations and audits.




The discovery of security flaws in Nagios XI emphasizes the need for preventive security measures in today’s digital landscape. Organizations can safeguard their important network infrastructure and reduce the risk of security breaches by resolving these vulnerabilities as soon as possible and being vigilant. Regular upgrades, cybersecurity measures as well as security evaluations are critical stages in guaranteeing network monitoring systems’ continuing dependability and security.


The sources for this piece include articles in The Hacker News and Security Affairs


Nagios XI Network Monitoring Software Flaws Exposed
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Nagios XI Network Monitoring Software Flaws Exposed
Discover critical Nagios XI network monitoring software flaws. Learn how to secure your infrastructure. Stay vigilant and protect yourself!
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