CVE-2023-40932

5.4 mediumEPSS 0.9%

Medium (5.4) in nagios nagios xi. 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.

Severity

CVSS 3.1

5.4 medium

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS: 0.9% chance of exploitation in the next 30 days; higher than 58% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2023-09-19
Modified: 2026-07-09
Record from: the NVD, synced 2026-10-19

Affected

nagios:nagios_xi

References

https://outpost24.com/blog/nagios-xi-vulnerabilities/
https://www.nagios.com/products/security/
https://outpost24.com/blog/nagios-xi-vulnerabilities/
https://www.nagios.com/products/security/

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