CVE-2018-25095 in Duplicator Plugin
Summary
by MITRE • 01/08/2024
The Duplicator WordPress plugin before 1.3.0 does not properly escape values when its installer script replaces values in WordPress configuration files. If this installer script is left on the site after use, it could be use to run arbitrary code on the server.
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Analysis
by VulDB Data Team • 06/03/2025
The vulnerability identified as CVE-2018-25095 affects the Duplicator WordPress plugin version 1.2.9 and earlier, representing a critical security flaw that stems from improper input validation and output escaping mechanisms within the plugin's installer script. This weakness allows attackers to manipulate configuration file values during the installation process, creating a persistent backdoor opportunity that can be exploited long after the initial installation phase has completed.
The technical implementation of this vulnerability resides in the installer script's failure to properly sanitize and escape user-supplied values when modifying WordPress configuration files such as wp-config.php. When the installer script is left active on the compromised site, it becomes a potential vector for arbitrary code execution, as the script does not adequately validate or escape input parameters before writing them to critical system files. This improper handling of user input creates a direct path for privilege escalation and remote code execution attacks.
From an operational perspective, this vulnerability presents a significant risk to WordPress administrators who may inadvertently leave the installer script accessible on their production servers. The impact extends beyond simple code execution, as attackers can leverage this flaw to gain full control over the affected WordPress installation, potentially leading to data breaches, service disruption, and further lateral movement within compromised networks. The vulnerability is particularly dangerous because it persists even after the initial installation process, creating a long-term attack surface that can be exploited repeatedly.
The security implications align with CWE-116, which addresses improper encoding or escaping of output, and can be mapped to ATT&CK technique T1059.007 for "Command and Scripting Interpreter: PowerShell" or T1059.001 for "Command and Scripting Interpreter: Windows Command Shell" when attackers leverage the compromised installer script for code execution. Organizations should immediately update to Duplicator plugin version 1.3.0 or later, which includes proper input validation and output escaping mechanisms. Additionally, administrators should remove any lingering installer scripts from production environments and implement comprehensive monitoring for unauthorized file modifications. The vulnerability demonstrates the critical importance of proper input sanitization in web applications and highlights the risks associated with leaving administrative scripts accessible on production systems.