CVE-2006-5113 in Exporia
Summary
by MITRE
Directory traversal vulnerability in common.php in Yuuki Yoshizawa Exporia 0.3.0 allows remote attackers to include and execute local files via a .. (dot dot) in the lan parameter to includes.php. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.
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Analysis
by VulDB Data Team • 04/23/2026
The vulnerability identified as CVE-2006-5113 represents a critical directory traversal flaw within the Yuuki Yoshizawa Exporia 0.3.0 web application framework. This security weakness resides in the common.php file and specifically affects the includes.php script's handling of the lan parameter. The vulnerability stems from insufficient input validation and sanitization mechanisms that fail to properly restrict user-supplied data before it is processed for file inclusion operations. Attackers can exploit this weakness by crafting malicious requests that contain .. (dot dot) sequences within the lan parameter, enabling them to navigate outside the intended directory structure and access arbitrary local files on the server.
The technical implementation of this vulnerability aligns with CWE-22, which categorizes directory traversal or path traversal attacks as a fundamental security flaw where attackers manipulate file path references to access unauthorized resources. When the Exporia framework processes the lan parameter through includes.php, it does not adequately validate or sanitize the input before using it in file inclusion functions such as include or require. This allows attackers to construct malicious paths that can traverse up directory levels and potentially access sensitive system files, configuration data, or other local resources that should remain protected from remote access. The vulnerability operates at the application layer and can be exploited through HTTP requests without requiring authentication or special privileges.
The operational impact of this vulnerability is severe and multifaceted. Remote attackers who successfully exploit this directory traversal weakness can execute arbitrary code on the target system by including and executing local files, potentially leading to complete system compromise. This vulnerability enables attackers to access sensitive information such as database credentials, application configuration files, user data, and system files that may contain additional exploitable weaknesses. The attack surface is particularly concerning because it allows for both information disclosure and remote code execution, providing attackers with extensive capabilities to escalate privileges and maintain persistent access to the compromised system.
From a threat modeling perspective, this vulnerability maps to several ATT&CK techniques including T1059.007 for command and scripting interpreter and T1566 for credential access through exploitation of software vulnerabilities. The attack chain typically begins with reconnaissance to identify the vulnerable application, followed by crafting malicious payloads that leverage the directory traversal mechanism to include and execute arbitrary files. Organizations should implement comprehensive mitigations including input validation, parameterized queries, and proper file access controls. The most effective defense mechanisms involve implementing strict input sanitization, using allowlists for valid language parameters, and employing secure coding practices that prevent dynamic file inclusion with user-controllable data. Additionally, regular security assessments and vulnerability scanning should be conducted to identify and remediate similar weaknesses in web applications that may be susceptible to path traversal attacks.