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Nagios XiApplication · Nagios

CVE-2023-7318

MEDIUM · 5.4 CVSS v3.1 Published 2025-10-30
Fix available
A fix is available. Upgrade to 2024 or later.
See remediation →
58/100
Remediation priority · Elevated
Remotely reachable

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 · unedited
Nagios XI versions prior to < 2024R1.0.2 are vulnerable to cross-site scripting (XSS) via the Nagios Core Command Expansion page. Insufficient validation or escaping of user-supplied input may allow an attacker to inject and execute arbitrary script in the context of a victim's browser.

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 · high confidence

Nagios XI versions before 2024R1.0.2 contain a reflected cross-site scripting (XSS) vulnerability in the Nagios Core Command Expansion page. The application fails to properly validate or escape user-supplied input before reflecting it back in HTML output, allowing attackers to inject and execute arbitrary JavaScript code in the context of authenticated users' browsers.

MitigationUpgrade to Nagios XI 2024R1.0.2 or later. Alternatively, implement proper input validation and output encoding on the Command Expansion page to sanitize user-supplied values before rendering them in the browser.

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
Nagios XiApplication
Affected:< 2024= 2024

CVSS 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
Low
User interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/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 checks

Work through these to decide whether this CVE applies to you.

  1. Determine Nagios XI version
    Locate the Nagios XI installation and identify the installed version number. This is typically visible in the Nagios XI admin interface footer, or can be retrieved via the system package manager or version file if accessible.
    Affected if The installed version is any version before 2024R1.0.2, or exactly version 2024 (e.g., 2024, 2024R1.0, 2024R1.0.1).
  2. Confirm access to Nagios Core Command Expansion page
    Log into the Nagios XI web interface and navigate to the Command Expansion page within the Nagios Core configuration section. This page is typically found under the Core Config Manager or similar administrative section.
    Affected if The page is accessible and accepts user-supplied input in any field (such as command definitions, argument fields, or description fields).
  3. Identify user input reflection points
    On the Command Expansion page, examine form fields where user input is submitted and then reflected back in the HTML response without visible encoding. This includes command names, argument labels, or description fields.
    Affected if User-supplied values submitted through this page are reflected in the HTML output without proper sanitization or encoding, allowing raw HTML or script tags to appear in the response.

A user is affected if their Nagios XI installation is version 2024 or any version before 2024R1.0.2 AND they have access to the Command Expansion page where unsanitized user input can be reflected in HTML output.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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.

dbcve · scoped
Upgrade available Upgrade to 2024 or later
Fixed in 2024
Interim mitigation

Upgrade to Nagios XI 2024R1.0.2 or later. Alternatively, implement proper input validation and output encoding on the Command Expansion page to sanitize user-supplied values before rendering them in the browser.

Recommended fix High confidence

2024R1.0.2 or later

  1. Back up your current Nagios XI installation and database before upgrading
  2. Download Nagios XI version 2024R1.0.2 or later from the official Nagios website (www.nagios.com)
  3. Run the upgrade following the official Nagios XI upgrade documentation
  4. After upgrade, verify the version is 2024R1.0.2 or later
  5. Test that the Nagios Core Command Expansion page functions correctly with the fix in place

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Nagios Xi Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA1.0 h
10.0 hours of engineering $1,750
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,800.

Scan for this in your stack

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-7318 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
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