CVE-2023-41564
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 · uneditedAn arbitrary file upload vulnerability in the Upload Asset function of Cockpit CMS v2.6.3 allows attackers to execute arbitrary code via uploading a crafted .shtml file.
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 confidenceArbitrary file upload vulnerability in Cockpit CMS v2.6.3 allows attackers to upload malicious .s.shtml files through the Upload Asset function. The .shtml extension is processed by the web server with Server-Side Include (SSI) parsing enabled, enabling remote code execution.
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= 2.6.3CVSS 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 if Cockpit CMS is installedLook for cockpit folder or cockpit.php in the webroot, or check for Cockpit CMS-specific files like /cockpit/storage or /cockpit/config.phpAffected if Cockpit CMS is present in the environment
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Check the installed Cockpit CMS versionLocate the version file or check the composer.json / package.json in the cockpit directory for the version numberAffected if The version is exactly 2.6.3
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Verify if the Upload Asset function is accessibleCheck if the /assets/add or similar upload endpoint is accessible without authentication or with the credentials used in your environmentAffected if The Upload Asset function is enabled and accessible
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Confirm .s.shtml file upload is possibleAttempt to upload a test file with .s.shtml extension through the Upload Asset interface or API endpointAffected if The system accepts and stores files with .s.shtml extension in a web-accessible location
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Check if SSI parsing is enabled for uploaded filesInspect the web server configuration (Apache .htaccess, nginx config, or IIS settings) to see if SSI/Server-Side Include parsing is enabled for the upload directoryAffected if SSI parsing is enabled for the directory where uploads are stored
You are affected if Cockpit CMS version 2.6.3 is installed, the Upload Asset function is accessible, .s.shtml files can be uploaded to a web-accessible location, and SSI parsing is enabled on the web server for that location.
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 dataImplement strict allowlist-based file type validation (not extension-only), store uploads outside webroot or use Content-Disposition: attachment headers, disable SSI parsing for uploaded files, and upgrade to patched version if available.
- Consultation3.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,720.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-41564 — 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-2023-41564 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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- 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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