Nagios Core before 4.5.13 and Nagios XI before 2026R1.5 contains a CSRF vulnerability in cmd.cgi. When no Cookie header is present, the double-submit cookie protection can be bypassed by supplying matching NagFormId and nagFormId values in the POST body, allowing a cross-site request to execute Nagios commands as a currently authenticated user.
Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to authenticated remote code execution via unfiltered NOTIFICATION-family macro substitution through the comdata parameter. When a notification command references $NOTIFICATIONCOMMENT$ or $NOTIFICATIONAUTHOR$ in a shell-reachable position, authenticated UI users can run arbitrary commands as the nagios user. Exploitation requires a non-default configuration in which a notification command references these macros in a shell-executed command line.
Nagios Core before 4.5.13 and Nagios XI before 2026R1.5 are vulnerable to authenticated remote code execution via custom-variable macro injection through the Nagios Remote Data Processor (NRDP). When a custom variable defined on a host, service, or contact is referenced in a shell-executed command line, an authenticated attacker with NRDP access can inject OS commands through the macro value. Exploitation requires a non-default configuration in which a custom variable is defined and referenced in a shell-executed command.
Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to DOM-based cross-site scripting in jsonquery.js. Unencoded JSON string values reflected from stored fields are inserted into the DOM without sanitization, allowing attackers to run arbitrary JavaScript in the victim's browser.
Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 contain a cross-site request forgery protection bypass via a self-supplied double-submit cookie. An attacker can supply matching cookie and request parameter values to bypass CSRF protection, enabling unauthenticated attackers to run commands as authorized users via malicious links.
Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to reflected cross-site scripting in cmd.cgi via the NagFormId parameter. An unauthenticated remote attacker can craft a malicious link that, when followed by an authenticated user, executes arbitrary JavaScript in the victim's browser.
Nagios XI versions prior to 2011R1.9 are vulnerable to cross-site scripting (XSS) via the handling of xiwindow variables used to build permalinks in the web interface. Insufficient validation or escaping of user-supplied input may allow an attacker to inject and execute arbitrary script in the context of a victim's browser.
Nagios XI versions prior to 2024R1 contain a missing access control vulnerability via the Web SSH Terminal. A remote, low-privileged attacker could access or interact with the terminal interface without sufficient authorization, potentially allowing unauthorized command execution or disclosure of sensitive information.
Nagios XI versions prior to 2026R1 contain a remote code execution vulnerability in the Core Config Manager (CCM) Run Check command. Insufficient validation/escaping of parameters used to build backend command lines allows an authenticated administrator to inject shell metacharacters that are executed on the server. Successful exploitation results in arbitrary command execution with the privileges of the Nagios XI web application user and can be leveraged to gain control of the underlying host operating system.
Nagios XI < 2026R1 is vulnerable to an authenticated command injection vulnerability within the MongoDB Database, MySQL Query, MySQL Server, Postgres Server, and Postgres Query wizards. It is possible to inject shell characters into arguments provided to the service and execute arbitrary system commands on the underlying host as the nagios user.
Nagios XI < 2024R1.3.2 contains a remote code execution vulnerability by chaining two flaws: an arbitrary file upload and a path traversal in the Core Config Snapshots interface. The issue arises from insufficient validation of file paths and extensions during MIB upload and snapshot rename operations. Exploitation results in the placement of attacker-controlled PHP files in a web-accessible directory, executed as the www-data user.
A cross-site scripting (XSS) vulnerability exists in Nagios XI 2024R2. The vulnerability allows remote attackers to execute arbitrary JavaScript in the context of a logged-in user's session via a specially crafted URL. The issue resides in a web component responsible for rendering performance-related data.
An issue with the Autodiscover component in Nagios XI 2024R1.01 allows a remote attacker to escalate privileges via a crafted Dashlet.
SQL Injection vulnerability in Nagios XI 2024R1.01 allows a remote attacker to execute arbitrary code via a crafted payload to the monitoringwizard.php component.
An issue in Nagios XI 2024R1.01 allows a remote attacker to escalate privileges via a crafted script to the /usr/local/nagios/bin/npcd component.
Nagios XI before version 5.11.3 was discovered to contain a remote code execution (RCE) vulnerability via the component commandtest.php.
Nagios XI before version 5.11.3 was discovered to contain a SQL injection vulnerability via the bulk modification tool.
Cross Site Scripting (XSS) in Nagios XI 5.7.1 allows remote attackers to run arbitrary code via returnUrl parameter in a crafted GET request.
Nagios XI v5.8.6 was discovered to contain a cross-site scripting (XSS) vulnerability via the System Settings page under the Admin panel.
Nagios XI before v5.8.7 was discovered to contain multiple cross-site scripting (XSS) vulnerabilities at auditlog.php.
Nagios XI v5.8.6 was discovered to contain a cross-site scripting (XSS) vulnerability via the MTR component in version 1.0.4.
Nagios XI v5.8.6 was discovered to contain a SQL injection vulnerability via the mibname parameter at the Manage MIBs page.
Nagios XI v5.8.6 was discovered to contain a cross-site scripting (XSS) vulnerability via the System Performance Settings page under the Admin panel.
Nagios XI before v5.8.7 was discovered to contain a cross-site scripting (XSS) vulnerability via the ajax.php script in CCM 3.1.5.
In Nagios XI through 5.8.5, an open redirect vulnerability exists in the login function that could lead to spoofing.
In Nagios XI through 5.8.5, a read-only Nagios user (due to an incorrect permission check) is able to schedule downtime for any host/services. This allows an attacker to permanently disable all monitoring checks.
In Nagios XI through 5.8.5, it is possible for a user without password verification to change his e-mail address.
In Nagios XI through 5.8.5, in the schedule report function, an authenticated attacker is able to inject HTML tags that lead to the reformatting/editing of emails from an official email address.
An issue was discovered in Nagios XI 5.8.5. In the Custom Includes section of the Admin panel, an administrator can upload files with arbitrary extensions as long as the MIME type corresponds to an image. Therefore it is possible to upload a crafted PHP script to achieve remote command execution.
An issue was discovered in Nagios XI 5.8.5. Insecure file permissions on the nagiosunbundler.py file allow the nagios user to elevate their privileges to the root user.