CVE-2008-0222 in filemanager
Summary
by MITRE
Unrestricted file upload vulnerability in ajaxfilemanager.php in the Wp-FileManager 1.2 plugin for WordPress allows remote attackers to upload and execute arbitrary PHP code via unspecified vectors.
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Analysis
by VulDB Data Team • 10/13/2024
The vulnerability identified as CVE-2008-0222 represents a critical security flaw in the Wp-FileManager 1.2 plugin for WordPress systems, specifically within the ajaxfilemanager.php component. This issue constitutes a classic unrestricted file upload vulnerability that fundamentally compromises the integrity and security posture of affected web applications. The vulnerability allows remote attackers to bypass normal file upload restrictions and execute malicious code on the target system, creating a severe attack surface that can be exploited for various malicious purposes.
The technical flaw resides in the improper validation and sanitization of file uploads within the ajaxfilemanager.php script. Attackers can leverage this weakness to upload PHP files containing malicious code, which then get executed within the context of the web server. This vulnerability operates under the Common Weakness Enumeration classification of CWE-434, which specifically addresses "Unrestricted Upload of File with Dangerous Type." The attack vector involves sending specially crafted HTTP requests that bypass the intended file type restrictions, allowing attackers to upload files with extensions such as .php, .phtml, or other executable formats that the server will process as legitimate web content.
The operational impact of this vulnerability extends far beyond simple code execution, as it provides attackers with a persistent foothold within the target environment. Once successful, attackers can upload backdoor scripts, web shells, or other malicious payloads that enable them to maintain access, escalate privileges, and potentially compromise the entire WordPress installation. The implications are particularly severe because WordPress installations often contain sensitive user data, administrative credentials, and business-critical information. According to ATT&CK framework category T1190, this vulnerability maps to "Exploit Public-Facing Application" which demonstrates how attackers can leverage web application flaws to gain initial access to systems.
The attack scenario typically begins with an unauthenticated attacker identifying the vulnerable plugin installation, followed by crafting malicious file uploads that exploit the unrestricted file upload mechanism. The vulnerability's exploitation does not require special privileges or complex attack chains, making it particularly dangerous for widespread deployment. Organizations running affected WordPress installations face significant risk of data breaches, unauthorized access, and potential full system compromise. The vulnerability also creates opportunities for attackers to establish persistent access through web shells, which can remain undetected for extended periods while providing continuous control over the compromised system.
Mitigation strategies for CVE-2008-0222 require immediate action to address the root cause through proper input validation and file type restriction mechanisms. Organizations should implement strict file extension validation, enforce MIME type checking, and ensure that uploaded files are stored outside the web root directory. The recommended approach includes implementing Content Security Policy headers, configuring proper file permissions, and deploying web application firewalls to detect and block malicious upload attempts. Additionally, regular security audits and vulnerability assessments should be conducted to identify similar weaknesses in other plugins or components. According to industry best practices and NIST guidelines, this vulnerability requires immediate patching or mitigation, as the Wp-FileManager 1.2 plugin has been deprecated and no longer receives security updates, making it essential for organizations to upgrade to supported alternatives or implement compensating controls to prevent exploitation.