CVE-2025-51511
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 · uneditedCadmium CMS v.0.4.9 has a background arbitrary file upload vulnerability in /admin/content/filemanager/uploads.
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 confidenceCadmium CMS 0.4.9 contains an arbitrary file upload vulnerability in the /admin/content/filemanager/uploads endpoint. An attacker can upload malicious files (e.g., web shells) to the server, potentially achieving remote code execution. The CVSS 9.8 indicates this is likely exploitable without authentication or with minimal privileges.
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= 0.4.9CVSS 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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Identify Cadmium CMS installation and versionLocate the Cadmium CMS installation directory and check the version identifier in the main configuration file, package.json, or composer.jsonAffected if The installed version is exactly 0.4.9
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Verify the vulnerable endpoint existsCheck if the /admin/content/filemanager/uploads endpoint is present by inspecting the web server configuration or attempting to access the routeAffected if The endpoint /admin/content/filemanager/uploads exists and responds to requests
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Test endpoint accessibility without authenticationSend an HTTP request to the /admin/content/filemanager/uploads endpoint without providing any authentication credentialsAffected if The endpoint accepts unauthenticated requests and returns a successful response (200 OK) rather than redirecting to a login page or returning 401/403
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Confirm file upload functionality is enabledInspect the filemanager configuration or try a test upload request to verify that the upload feature is actively enabled in the CMS settingsAffected if File uploads are permitted and the system does not block upload requests at the application level
If Cadmium CMS version 0.4.9 is installed and the /admin/content/filemanager/uploads endpoint is reachable without authentication, the environment is affected by this 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 dataImplement strict allowlist-based file validation (both extension and MIME type) with magic byte inspection, store uploads outside the web root or rename files to prevent execution, and require proper authentication/authorization for the upload endpoint.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,984.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-51511 — 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-2025-51511 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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