CVE-2026-16060 in Insert or Embed Articulate Content Plugin
Summary
by MITRE • 08/03/2026
The Insert or Embed Articulate Content into WordPress plugin through 4.3000000027 does not correctly validate the contents of an uploaded archive, relying on a bypassable check that lets an Editor-level user upload a server-executable file into a public directory, resulting in remote code execution on servers configured to execute it.
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Analysis
by VulDB Data Team • 08/03/2026
This vulnerability exists within the Insert or Embed Articulate Content into WordPress plugin version 4.3000000027 and earlier, representing a critical security flaw that allows unauthorized remote code execution through improper file validation mechanisms. The issue stems from inadequate input sanitization during archive upload processing, where the plugin fails to properly verify the contents of uploaded files before storing them on the web server. Attackers with Editor-level privileges can exploit this weakness by uploading malicious executable files that bypass the plugin's validation checks, ultimately gaining the ability to execute arbitrary code on the target system.
The technical flaw manifests as a failure in the plugin's file type verification process, which relies on easily circumvented validation methods. The vulnerability allows an authenticated attacker with Editor user permissions to upload files that would normally be restricted from execution on the web server. This occurs because the plugin's archive processing logic does not perform thorough content inspection or proper file extension validation. Instead, it employs a simplistic check that can be bypassed through various means such as renaming files, manipulating file headers, or exploiting weaknesses in the validation algorithm. The uploaded malicious files are placed in publicly accessible directories, making them immediately executable by attackers.
The operational impact of this vulnerability is severe and far-reaching, as it provides an attacker with persistent remote code execution capabilities on compromised WordPress installations. Once successfully exploited, the vulnerability enables attackers to establish backdoors, exfiltrate data, escalate privileges, or use the compromised server for further attacks against other systems. The low privilege requirement makes this particularly dangerous since many WordPress installations have Editor accounts that are not properly secured or monitored. Additionally, the vulnerability affects servers where executable files are permitted in web-accessible directories, which is common in standard WordPress configurations.
From a cybersecurity perspective, this vulnerability maps to CWE-434 Unrestricted Upload of File with Dangerous Type and aligns with ATT&CK technique T1190 Exploit Public-Facing Application. The flaw represents a classic privilege escalation vector that demonstrates poor input validation practices and inadequate security controls within the plugin's file handling mechanism. Organizations using this plugin should immediately implement mitigations including updating to the latest version, restricting Editor permissions, implementing proper file upload restrictions, and monitoring for suspicious upload activities. System administrators should also consider implementing web application firewalls and content filtering solutions to prevent exploitation attempts. The vulnerability highlights the critical importance of robust file validation and access control measures in web applications, particularly those handling user-uploaded content in WordPress environments where plugins often serve as attack vectors due to their privileged access to server resources.