CVE-2025-34283: Nagios XI < 2024R1.4.2 API Key Disclosure via Neptune Themes

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-10-30 · updated 2026-10-07
Weakness: CWE-497

Description

Nagios XI versions prior to 2024R1.4.2 revealed API keys to users who were not authorized for API access when using Neptune themes. An authenticated user without API privileges could view another user's or their own API key value.

Affected products

Nagios XI: before 2024; 2024-r1, 2024-r1.0.1, 2024-r1.0.2, 2024-r1.1, 2024-r1.1.1, 2024-r1.1.2 (+13) — fixed in 2024

How to fix

Upgrade to a fixed version: Nagios XI 2024. Check the vendor advisory for mitigations.

References

https://www.nagios.com/changelog/nagios-xi/
https://www.nagios.com/products/security/#nagios-xi
https://www.vulncheck.com/advisories/nagios-xi-api-key-disclosure-via-neptune-themes

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