CVE-2009-4672 in WP-Lytebox
Summary
by MITRE
Directory traversal vulnerability in main.php in the WP-Lytebox plugin 1.3 for WordPress allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the pg parameter.
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Analysis
by VulDB Data Team • 05/01/2026
The CVE-2009-4672 vulnerability represents a critical directory traversal flaw in the WP-Lytebox WordPress plugin version 1.3, exposing systems to arbitrary file inclusion attacks. This vulnerability resides in the main.php script where the pg parameter fails to properly validate user input, creating an opportunity for malicious actors to manipulate file paths and access sensitive system resources. The flaw allows remote attackers to exploit the plugin's file inclusion mechanism by injecting directory traversal sequences using the .. (dot dot) notation, which can lead to unauthorized access to local files on the server.
The technical exploitation of this vulnerability follows a classic directory traversal pattern where the attacker manipulates the pg parameter to navigate through the file system hierarchy. When the plugin processes the pg parameter without proper sanitization, it becomes possible to reference files outside the intended directory structure, potentially allowing access to configuration files, user databases, or other sensitive system components. This type of vulnerability is categorized under CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The vulnerability demonstrates poor input validation practices where the application fails to sanitize or filter user-supplied data before using it in file operations.
The operational impact of CVE-2009-4672 extends beyond simple file access, as it provides attackers with the capability to execute arbitrary code on the affected WordPress installation. Once an attacker successfully exploits the directory traversal, they can potentially include malicious files that execute commands on the server, leading to complete system compromise. This vulnerability affects not only the confidentiality of data but also the integrity and availability of the WordPress environment, as attackers can modify or delete critical system files. The attack surface is particularly concerning given that WordPress plugins often have elevated privileges and access to sensitive data within the web application context.
Mitigation strategies for this vulnerability should include immediate patching of the WP-Lytebox plugin to version 1.4 or later, which contains the necessary security fixes to prevent directory traversal attacks. System administrators should also implement input validation measures at multiple layers, including web application firewalls and proper parameter sanitization within the application code. The principle of least privilege should be enforced by ensuring that the web server runs with minimal required permissions and that file access controls are properly configured to prevent unauthorized file access. Additionally, monitoring and logging mechanisms should be enhanced to detect suspicious file access patterns that may indicate exploitation attempts, as outlined in the ATT&CK framework's techniques for privilege escalation and credential access. Organizations should also conduct regular security assessments and penetration testing to identify similar vulnerabilities in other plugins and components of their WordPress installations.