CVE-2023-0651
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 vulnerability was found in FastCMS 0.1.0. It has been classified as critical. Affected is an unknown function of the component Template Management. The manipulation leads to unrestricted upload. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.
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 confidenceFastCMS 0.1.0 contains an unrestricted file upload vulnerability in the Template Management component, allowing remote attackers to upload arbitrary files (likely including malicious executables) due to missing or inadequate file type and content validation. This could enable remote code execution on the server.
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= 0.1.0CVSS 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
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/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 FastCMS installationIdentify if FastCMS is running in the environment by checking for fastcms processes, installed packages, or web application directories containing fastcms filesAffected if FastCMS software is present in the environment
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Verify the installed versionCheck the FastCMS version number through package.json, composer.json, or the application metadata. Common commands: npm list fastcms, pip show fastcms, or inspect the version file in the application rootAffected if The installed version is exactly 0.1.0
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Locate Template Management componentIdentify if the Template Management feature exists by checking the application's admin interface, routing configuration, or template-related directories and endpointsAffected if The Template Management component is accessible or enabled in the application
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Verify file upload capability existsCheck if the Template Management area includes upload functionality by examining the web interface, API endpoints (often under /admin/template or similar paths), or source code for file upload handlers in the template moduleAffected if File upload functionality is present in the Template Management component
If FastCMS version 0.1.0 is installed and the Template Management component with file upload capability is accessible, the environment is affected by this CVE.
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 dataRestrict file uploads in the Template Management component by implementing strict allowlist-based file type validation, validating file content/magic bytes, storing uploads outside the web root, and disabling script execution in upload directories. If no patch is available, consider disabling the template upload feature until a fix is released.
- Consultation6.0 h
- Implementation12.0 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-2023-0651 — 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-2023-0651 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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