A Cross-site scripting (XSS) vulnerability in Nagios XI version 5.11.1 and below allows authenticated attackers with access to the custom logo component to inject arbitrary javascript or HTML via the alt-text field. This affects all pages containing the navbar including the login page which means the attacker is able to to steal plaintext credentials.

A SQL injection vulnerability in Nagios XI from version 5.11.0 up to and including 5.11.1 allows authenticated attackers to execute arbitrary SQL commands via the ID parameter in the POST request to /nagiosxi/admin/banner_message-ajaxhelper.php

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.

PNP4Nagios through 81ebfc5 has stored XSS in the AJAX controller via the basket API and filters. This affects 0.6.26.

PNP4Nagios through 81ebfc5 lacks CSRF protection in the AJAX controller. This affects 0.6.26.

A vulnerability classified as problematic was found in Nagios NCPA. This vulnerability affects unknown code of the file agent/listener/templates/tail.html. The manipulation of the argument name leads to cross site scripting. The attack can be initiated remotely. Upgrading to version 2.4.0 is able to address this issue. The name of the patch is 5abbcd7aa26e0fc815e6b2b0ffe1c15ef3e8fab5. It is recommended to upgrade the affected component. VDB-216874 is the identifier assigned to this vulnerability.

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.

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 v5.8.6 was discovered to contain a SQL injection vulnerability via the mib_name parameter at the Manage MIBs page.

Nagios XI v5.8.6 was discovered to contain a cross-site scripting (XSS) vulnerability via the MTR component in version 1.0.4.