CVE-2025-34284
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 · uneditedNagios XI versions prior to 2024R2 contain a command injection vulnerability in the WinRM plugin. Insufficient validation of user-supplied parameters allows an authenticated administrator to inject shell metacharacters that are incorporated into backend command invocations. Successful exploitation enables arbitrary command execution with the privileges of the Nagios XI web application user and can be leveraged to modify configuration, exfiltrate data, disrupt monitoring operations, or execute commands on the underlying host operating system.
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 confidenceNagios XI versions before 2024R2 contain a command injection vulnerability in the WinRM plugin. The plugin fails to properly validate user-supplied parameters, allowing authenticated administrators to inject shell metacharacters that get incorporated into backend command invocations. This enables arbitrary command execution with the privileges of the Nagios XI web application user.
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< 2024= 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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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Confirm Nagios XI is installedCheck for the presence of Nagios XI by examining the /usr/local/nagiosxi directory, or by accessing the Nagios XI web interface login page. The web interface typically responds at /nagiosxi/ or the root of the web server.Affected if Nagios XI is present and accessible
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Identify the installed Nagios XI versionRun the command 'cat /usr/local/nagiosxi/etc/xi_version.php' or check the version displayed in the web interface footer after logging in as administrator. Compare the version number to the affected range: versions before 2024 or the 2024 release (prior to 2024R2).Affected if The version is 2024 or any version before 2024 (e.g., 2023.x, 2022.x, etc.)
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Verify if the WinRM plugin is configuredNavigate to the WinRM plugin configuration in the Nagios XI web interface under 'Admin' > 'WinRM' or check the configuration files in /usr/local/nagiosxi/etc/ for winrm-related configuration files. Also examine /usr/local/nagios/libexec/ for the winrm plugin binary.Affected if WinRM plugin is present and configured in Nagios XI
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Review WinRM plugin configuration for parameter handlingExamine the WinRM plugin configuration files or template files for how user-supplied parameters (such as hostnames, usernames, or passwords) are incorporated into command invocations. Look for direct string concatenation without input validation in the plugin code.Affected if The WinRM plugin accepts user-supplied parameters that flow directly into shell commands
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Check for suspicious command execution logsReview Nagios XI logs in /usr/local/nagiosxi/var/log/ for unusual or unexpected command executions involving the winrm plugin. Also check system audit logs (audit.log) and web server access logs for winrm-related requests containing shell metacharacters.Affected if Unusual command patterns or shell metacharacters appear in logs related to WinRM plugin usage
You are affected if Nagios XI version is 2024 or any version before 2024, and the WinRM plugin is configured with user-supplied parameters that could be manipulated.
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.
dbcve · scoped2024
Upgrade Nagios XI to version 2024R2 or later to obtain the patched version of the WinRM plugin. Additionally, restrict administrator access and monitor for suspicious command activity as a defense-in-depth measure.
Nagios XI 2024R2 or later
- Back up the Nagios XI system and database before performing any upgrade
- Download Nagios XI version 2024R2 or later from the official Nagios website
- Run the official Nagios XI upgrade installer following the vendor's documented upgrade procedure
- After upgrade completes, verify the WinRM plugin has been updated and the vulnerability is resolved
- Confirm Nagios XI services are running correctly post-upgrade
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-34284 — 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-2025-34284 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
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