CVE-2025-56432
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA 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.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceA reflected cross-site scripting (XSS) vulnerability exists in Nagios XI 2024R2 within a web component that renders performance-related data. Attackers can craft malicious URLs containing JavaScript payloads that execute in the context of a logged-in user's session.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 2024CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- Required
- Scope
- Changed
- Confidentiality
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify Nagios XI versionAccess the Nagios XI admin interface footer or check the version file at /usr/local/nagiosxi/etc/version.ini. Alternatively, run: cat /usr/local/nagiosxi/etc/xi-version.txtAffected if Version is 2024R2 (2024) - compare your installed version to this affected range
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Confirm web interface is activeVerify the Nagios XI web interface is running and accessible by visiting your Nagios XI URL (typically /nagiosxi/) in a browserAffected if The web interface is exposed and accessible to users
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Identify exposed performance data componentsReview Nagios XI for components that render performance data, such as performance graphs, service performance details, or host performance metrics pages. Check URL parameters used in performance-related viewsAffected if The performance rendering component is accessible via web URLs and accepts user-supplied input in URL parameters
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Test for reflected XSS in performance URLsCraft a test URL with a benign XSS payload in parameters used by performance data components (for example: ?param=<script>alert(1)</script>). Do not execute, only inspect whether the payload is reflected back in the response without encodingAffected if User-supplied input from URL parameters is reflected in the HTML response without proper encoding
If running Nagios XI 2024R2 and the performance data rendering web component is accessible and reflects URL parameters unsanitized, the environment is affected by this reflected XSS vulnerability.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply vendor patches for Nagios XI 2024R2 or implement input validation and output encoding on the affected performance data rendering component.
- Consultation4.0 h
- Implementation4.0 h
- Testing4.0 h
- Review / QA2.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2025-56432 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-56432 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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