CVE-2013-2201 in WordPress
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in WordPress before 3.5.2 allow remote attackers to inject arbitrary web script or HTML via vectors involving (1) uploads of media files, (2) editing of media files, (3) installation of plugins, (4) updates to plugins, (5) installation of themes, or (6) updates to themes.
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Analysis
by VulDB Data Team • 01/03/2022
The vulnerability identified as CVE-2013-2201 represents a critical cross-site scripting weakness affecting WordPress versions prior to 3.5.2, classified under CWE-79 in the Common Weakness Enumeration framework. This vulnerability stems from insufficient input validation and output sanitization mechanisms within the WordPress content management system, specifically during file upload and management operations. Attackers can exploit this flaw to execute malicious scripts in the context of a victim's browser, potentially leading to session hijacking, data theft, or unauthorized administrative actions.
The technical flaw manifests across multiple attack vectors including media file uploads and editing, plugin installation and updates, and theme management operations. During media file handling, the system fails to properly sanitize file names and metadata, allowing malicious actors to inject crafted script code that executes when the file information is displayed or processed. Similarly, during plugin and theme operations, the vulnerability occurs when the system processes user-supplied data without adequate validation, creating opportunities for attackers to embed malicious payloads within the installation or update procedures. This weakness aligns with ATT&CK technique T1566.001, which describes the use of malicious files to gain initial access or execute code on target systems.
The operational impact of CVE-2013-2201 extends beyond simple script injection, as it can facilitate more sophisticated attacks within WordPress environments. An attacker who successfully exploits this vulnerability could potentially escalate privileges, access sensitive administrative functions, or establish persistent backdoors through the injected scripts. The vulnerability affects the core functionality of WordPress installations, making it particularly dangerous for websites with multiple users or administrative capabilities. Organizations using vulnerable versions face significant risk of unauthorized access, data compromise, and potential complete system takeover if attackers gain administrative privileges through exploitation.
Mitigation strategies for this vulnerability center on immediate patching to WordPress version 3.5.2 or later, which contains the necessary security fixes. Additionally, administrators should implement comprehensive input validation at multiple layers, including file name sanitization, metadata validation, and proper output encoding for all user-supplied content. Network-level protections such as web application firewalls can provide additional defense-in-depth measures, though they cannot replace proper code-level fixes. Security monitoring should focus on detecting unusual file upload patterns, unauthorized plugin or theme modifications, and suspicious script execution within WordPress environments. Regular security audits and vulnerability assessments help identify similar weaknesses in other components of the WordPress ecosystem, while proper access controls and least-privilege principles reduce the potential impact of successful exploitation attempts.