CVE-2012-2227 in PluXml
Summary
by MITRE
Directory traversal vulnerability in update/index.php in PluXml before 5.1.6 allows remote attackers to include and execute arbitrary local files via a ..%2F (encoded dot dot slash) in the default_lang parameter.
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Analysis
by VulDB Data Team • 03/26/2025
The CVE-2012-2227 vulnerability represents a critical directory traversal flaw in PluXml content management system versions prior to 5.1.6. This vulnerability exists within the update/index.php script and specifically targets the default_lang parameter handling. The flaw enables remote attackers to manipulate file inclusion mechanisms by exploiting encoded directory traversal sequences, creating a pathway for arbitrary code execution on affected systems. The vulnerability stems from insufficient input validation and improper sanitization of user-supplied parameters that are directly used in file system operations.
The technical exploitation of this vulnerability relies on the manipulation of the default_lang parameter through encoded dot dot slash sequences represented as ..%2F. When an attacker submits a malicious payload containing this encoded traversal sequence, the application fails to properly validate or sanitize the input before using it in file inclusion operations. This allows the attacker to traverse the file system hierarchy and access files outside the intended directory structure. The vulnerability is particularly dangerous because it can be exploited remotely without requiring authentication, making it accessible to any attacker with network access to the vulnerable system.
The operational impact of CVE-2012-2227 extends beyond simple file disclosure to full system compromise capabilities. Successful exploitation can lead to arbitrary code execution, allowing attackers to execute malicious commands on the target server. This could result in complete system takeover, data exfiltration, or the deployment of backdoors. The vulnerability affects the core update functionality of PluXml, which means that attackers could potentially compromise the system during routine update processes or by exploiting the vulnerability through the update mechanism itself. Organizations running vulnerable versions face significant risk of unauthorized access and potential data breaches.
Security mitigations for this vulnerability involve immediate patching to PluXml version 5.1.6 or later, which contains proper input validation and sanitization mechanisms. System administrators should also implement network-level controls such as web application firewalls that can detect and block malicious traversal sequences in URL parameters. Input validation should be strengthened to reject any sequences containing directory traversal patterns, and parameterized queries should be implemented to prevent direct file system access based on user input. Organizations should also conduct comprehensive vulnerability assessments to identify any other potentially affected components within their PluXml installations and ensure proper access controls are in place to limit the impact of any successful exploitation attempts.
This vulnerability aligns with CWE-22 Directory Traversal and follows patterns commonly associated with the attack technique T1059 Command and Scripting Interpreter in the MITRE ATT&CK framework. The flaw demonstrates how insufficient input validation in web applications can create pathways for attackers to bypass security controls and gain unauthorized access to system resources. The vulnerability underscores the importance of proper parameter validation and the principle of least privilege in web application security design, as it allows attackers to access arbitrary local files through what should be a simple language selection parameter.