Wp Mlm UnilevelWordPress extension · Wpmlmsoftware

CVE-2023-51475

CRITICAL · 9.8 CVSS v3.1 Published 2023-12-29
Fix available
A fix is available. Upgrade to after 4.0 or later.
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 IOSS WP MLM SOFTWARE PLUGIN.This issue affects WP MLM SOFTWARE PLUGIN: from n/a through 4.0.

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 confidence

The WP MLM SOFTWARE plugin for WordPress contains an unrestricted file upload vulnerability (CWE-434) allowing attackers to upload dangerous file types without proper validation. This could enable remote code execution by uploading malicious scripts (e.g., PHP files) to the web server.

MitigationRestrict file uploads to safe, expected file types (images, documents) with server-side validation including magic byte verification, disallow executable extensions (.php, .exe, .phtml), and store uploads outside the web root or with .htaccess protection to prevent 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
Wp Mlm UnilevelWordPress extension
Affected:<= 4.0

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
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 checks

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

  1. Confirm WP MLM SOFTWARE plugin is installed
    Access WordPress admin panel and navigate to Plugins > Installed Plugins to locate the plugin, or inspect the plugins directory for folders containing 'mlm' or 'unilevel' in the name
    Affected if The plugin is present in the WordPress installation
  2. Verify the plugin version
    In WordPress admin, view the plugin details page to read the version number, or open the main plugin PHP file and locate the Version header in the plugin comment block
    Affected if The installed version is 4.0 or lower
  3. Confirm file upload functionality is accessible
    Navigate to the plugin settings or frontend pages where upload forms exist (typically in member registration, profile, or compensation plan assignment areas)
    Affected if The file upload feature is enabled and accessible to users or administrators
  4. Check upload directory for dangerous files
    Examine the uploads directory (default is wp-content/uploads/ or a custom path configured in the plugin) for files with executable extensions such as .php, .phtml, .php5, .php7, or .exe
    Affected if Executable file types are present in the upload directory

The environment is affected if the WP MLM SOFTWARE plugin version 4.0 or lower is installed and the file upload feature is accessible, regardless of whether malicious files are already present

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.

From vendor data
Upgrade available Upgrade to a release after 4.0
Interim mitigation

Restrict file uploads to safe, expected file types (images, documents) with server-side validation including magic byte verification, disallow executable extensions (.php, .exe, .phtml), and store uploads outside the web root or with .htaccess protection to prevent execution.

Fix this in Wp Mlm Unilevel Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing4.0 h
  • Review / QA3.0 h
19.0 hours of engineering $3,380
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,408.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2023-51475 — 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 sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-51475 in production — separate from our analysis above.

No notes yet

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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
  • 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
  • No spam, self-promotion, credentials, or personal data