CVE-2023-51475 CRITICAL

CVE-2023-51475: WordPress WP MLM Unilevel Plugin <= 4.0 is vulnerable to Arbitrary File Upload

Vendor Ioss
Product WP MLM SOFTWARE PLUGIN
Weakness CWE-434 · Unrestricted file upload
Published December 29, 2023
Last update April 28, 2026
View on NVD All CVEs

CVSS base score

10.0/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

What the vulnerability does

01Description

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.

Explanation of Vulnerability in Simple Terms

02Summary

The WP MLM Software plugin through version 4.0 does not properly validate file uploads, allowing an attacker to upload malicious files without authentication. An attacker can upload arbitrary files to the site, potentially including PHP scripts that execute with site privileges. This vulnerability affects all users of the plugin and requires immediate patching.

What an attacker can do

03Attacker Capabilities

Upload arbitrary files (including PHP scripts) to the site without authentication.

Potential impact on your site

04Site Impact

Attackers can upload and execute malicious code on your site, leading to full compromise.

Conditions required to exploit

05Prerequisites

Network access to the site; no authentication or user interaction required.

Key dates

06Disclosure timeline

December 29, 2023 CVE published
April 28, 2026 Record updated