CVE-2013-2009 in WP Super Cache Plugin
Summary
by MITRE
WordPress WP Super Cache Plugin 1.2 has Remote PHP Code Execution
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Analysis
by VulDB Data Team • 04/03/2025
The vulnerability identified as CVE-2013-2009 represents a critical remote code execution flaw within the WordPress WP Super Cache plugin version 1.2. This security weakness resides in the plugin's handling of user-supplied input within the cache management functionality, specifically affecting the plugin's ability to process and validate file paths. The vulnerability stems from improper sanitization of input parameters that are used to determine cache file locations, creating an opportunity for malicious actors to inject arbitrary PHP code into the web server. The flaw is particularly dangerous because it allows attackers to execute code with the privileges of the web server process, potentially enabling full system compromise.
The technical implementation of this vulnerability involves a path traversal attack vector where the plugin fails to properly validate and sanitize file paths submitted through HTTP requests. When users interact with the cache management features, the plugin processes these inputs without adequate filtering mechanisms, allowing attackers to manipulate the file system operations. This occurs because the plugin's code does not properly validate the input parameters before using them in file operations, creating a condition where maliciously crafted paths can bypass normal access controls. The vulnerability is classified under CWE-22 as a path traversal weakness, which falls within the broader category of improper input validation issues. Attackers can exploit this by crafting specific requests that include directory traversal sequences, enabling them to access and execute files outside the intended directory structure.
The operational impact of CVE-2013-2009 extends far beyond simple code execution, as it provides attackers with the ability to fully compromise WordPress installations running vulnerable versions of the WP Super Cache plugin. Once successfully exploited, attackers can upload malicious files, modify existing content, steal sensitive data, or establish persistent backdoors within the affected systems. The vulnerability affects not only individual websites but can also serve as a stepping stone for broader network attacks, particularly in environments where multiple WordPress installations share common infrastructure. Organizations using this plugin are at risk of complete system compromise, data breaches, and potential regulatory violations depending on the nature of the compromised data. The attack surface is particularly large since WordPress remains one of the most widely used content management systems, making this vulnerability attractive to automated exploitation tools.
Mitigation strategies for CVE-2013-2009 require immediate action from affected organizations, including the immediate upgrade to patched versions of the WP Super Cache plugin or complete removal of the vulnerable plugin from affected systems. Security teams should implement network-based protections such as web application firewalls to detect and block malicious requests targeting known exploitation patterns. Additionally, organizations should conduct thorough vulnerability assessments to identify all systems running vulnerable plugin versions and ensure proper input validation is implemented at multiple layers of their security infrastructure. The remediation process should include monitoring for signs of exploitation attempts and implementing proper access controls for cache management functions. This vulnerability highlights the importance of maintaining up-to-date security patches and following the principle of least privilege in web application security. Organizations should also consider implementing the ATT&CK framework's mitigation strategies for command and control activities, particularly focusing on preventing unauthorized code execution and limiting the attack surface through proper input validation and access controls.