An issue was found in Nagios XI before 5.7.3. There is a privilege escalation vulnerability in backend scripts that ran as root where some included files were editable by nagios user. This issue was fixed in version 5.7.3.

Graph Explorer in Nagios XI before 5.7.2 allows XSS via the link url option.

In Nagios XI before 5.7.3, ajaxhelper.php allows remote authenticated attackers to execute arbitrary commands via cmdsubsys.

Nagios XI before 5.6.6 allows remote command execution as root. The exploit requires access to the server as the nagios user, or access as the admin user via the web interface. The getprofile.sh script, invoked by downloading a system profile (profile.php?cmd=download), is executed as root via a passwordless sudo entry; the script executes check_plugin, which is owned by the nagios user. A user logged into Nagios XI with permissions to modify plugins, or the nagios user on the server, can modify the check_plugin executable and insert malicious commands to execute as root.

Cross-site scripting (XSS) vulnerability in Nagios XI before 5.5.11 allows attackers to inject arbitrary web script or HTML via the xiwindow parameter.

Privilege escalation in Nagios XI before 5.5.11 allows local attackers to elevate privileges to root via write access to config.inc.php and import_xiconfig.php.

SQL injection vulnerability in Nagios XI before 5.5.11 allows attackers to execute arbitrary SQL commands via the API when using fusekeys and malicious user id.

Command injection in Nagios XI before 5.5.11 allows an authenticated users to execute arbitrary remote commands via a new autodiscovery job.

SQL injection vulnerability in functions/prepend_adm.php in Nagios Core Config Manager in Nagios XI before 2012R2.4 allows remote attackers to execute arbitrary SQL commands via the tfPassword parameter to nagiosql/index.php.