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Unrestricted File UploadWeakness · CWE-434

CVE-2025-48106

CRITICAL · 10.0 CVSS v3.1 Published 2025-10-22
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

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
Unrestricted Upload of File with Dangerous Type vulnerability in CMSSuperHeroes Clanora clanora allows Using Malicious Files.This issue affects Clanora: from n/a through < 1.3.1.

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 confidence

The Clanora theme for CMSSuperHeroes CMS contains an unrestricted file upload vulnerability (CWE-434) that allows attackers to upload dangerous file types (e.g., PHP shells, executables) to the server. With a CVSS 10 score, this is likely remotely exploitable without authentication, potentially allowing complete system compromise through arbitrary code execution.

MitigationImplement strict server-side validation of uploaded files including extension allowlisting, MIME type verification, content-type magic byte inspection, and store uploads outside the webroot or with renamed filenames to prevent direct execution.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

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
None
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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 checks

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

  1. Identify Clanora theme installation
    Search the web server file system for the Clanora theme directory. Common paths include /wp-content/themes/clanora/ (if WordPress-based) or themes/clanora/ within the CMSSuperHeroes CMS root directory. List all theme directories and look for 'clanora' folder name.
    Affected if The Clanora theme folder exists on the server filesystem.
  2. Verify CMSSuperHeroes CMS presence
    Check if the underlying CMS is CMSSuperHeroes by searching for its signature files such as 'CMSSuperHeroes' in source code, or look for its characteristic directory structure under /includes/ or /framework/.
    Affected if The server runs CMSSuperHeroes CMS as the content management system.
  3. Locate file upload functionality
    Examine the Clanora theme for file upload forms or endpoints. Search for PHP files containing 'upload', 'file', or form elements with enctype='multipart/form-data'. Common locations include theme root, /inc/, or /includes/ subdirectories.
    Affected if The theme contains active file upload handlers or forms that accept user-supplied files.
  4. Inspect upload storage configuration
    Review the upload handling code to determine where uploaded files are stored. Look for move_uploaded_file() calls, copy() operations, or path variables pointing to /uploads/, /media/, or /wp-content/uploads/. Check if storage path is within the webroot.
    Affected if Uploaded files are stored in a web-accessible directory without execution prevention (e.g., no .htaccess restrictions, no renamed filenames).

A system is affected if it runs CMSSuperHeroes CMS with the Clanora theme installed and contains exposed file upload functionality that stores files in web-accessible locations without validation.

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
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Implement strict server-side validation of uploaded files including extension allowlisting, MIME type verification, content-type magic byte inspection, and store uploads outside the webroot or with renamed filenames to prevent direct execution.

Recommended fix Moderate confidence

Clanora version 1.3.1 or later

  1. Create a complete backup of the website including database and all files
  2. Locate the CMSSuperHeroes Clanora theme/plugin in your installation
  3. Download Clanora version 1.3.1 or the latest stable version from a legitimate source
  4. Disable the current Clanora installation
  5. Upload and install the updated version (1.3.1 or later)
  6. Verify the installation was successful
  7. Test file upload functionality to confirm the vulnerability is resolved
  8. Restore the website from backup if any issues occur during upgrade
Caveat Review theme/plugin changelog before upgrading as customizations may be affected

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

Have this fixed Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing3.0 h
  • Review / QA2.0 h
11.0 hours of engineering $1,930
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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-2025-48106 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
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  • Version or environment caveats, and links to real fixes
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