XSS in Nagios Xi

CVE-2025-56432

A cross-site scripting (XSS) vulnerability exists in Nagios XI 2024R2. The vulnerability allows remote attackers to execute arbitrary JavaScript in the context of a logged-in user's session via a specially crafted URL. The issue resides in a web component responsible for rendering performance-related data.

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.009 (57.2th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-56432: held from 0.009 to 0.009.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2025-56432?
CVE-2025-56432 is a medium-severity vulnerability in Nagios Xi, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-08-26.
How severe is CVE-2025-56432?
Medium severity. CVSS v3 base score is 6.1 out of 10.
Is CVE-2025-56432 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.