CVE-2023-40932: Nagios XI

Medium severity, CVSS 5.4. EPSS: 0.9% chance of exploitation in the next 30 days.

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.

Affected products

• Nagios Nagios XI: before 5.11.2 (fixed in 5.11.2)

Published 2023-09-19. Last modified 2026-07-09.