CVE-2012-6630 in Media Library Categories
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in the Media Library Categories plugin 1.1.1 for WordPress allow remote attackers to inject arbitrary web script or HTML via the (1) bulk parameter to media-library-categories/add.php or (2) q parameter to media-library-categories/view.php.
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Analysis
by VulDB Data Team • 02/25/2018
The vulnerability identified as CVE-2012-6630 represents a critical cross-site scripting flaw within the Media Library Categories plugin version 1.1.1 for WordPress platforms. This vulnerability exists in the plugin's handling of user-supplied input parameters, specifically targeting two distinct entry points that process data without proper sanitization or validation mechanisms. The flaw affects the core security posture of WordPress installations that utilize this particular plugin, creating potential attack vectors for malicious actors seeking to compromise user sessions or execute unauthorized code within the browser context of authenticated users.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding practices within the plugin's PHP code. Attackers can exploit the vulnerability by crafting malicious payloads and injecting them through the bulk parameter in the media-library-categories/add.php endpoint or through the q parameter in the media-library-categories/view.php endpoint. These parameters are directly incorporated into HTML output without proper sanitization, allowing attackers to inject malicious JavaScript code or HTML content that executes in the context of other users' browsers. The vulnerability manifests as a classic XSS flaw that can be categorized under CWE-79, which specifically addresses Cross-Site Scripting vulnerabilities in software applications. This weakness enables attackers to bypass the same-origin policy that protects web browsers, potentially leading to session hijacking, credential theft, or unauthorized administrative actions.
The operational impact of this vulnerability extends beyond simple data corruption or display issues, as it can enable sophisticated attack chains that leverage the compromised user sessions. When authenticated users visit pages that process the malicious input, the injected scripts execute with the privileges of the victim user, potentially allowing attackers to access sensitive administrative functions, modify content, or steal session cookies. The vulnerability's exploitation can result in persistent XSS attacks where malicious scripts remain embedded in the application's data stores and execute every time affected pages are loaded. This creates a persistent threat that can affect multiple users over extended periods, making the vulnerability particularly dangerous in multi-user environments where administrators and regular users share the same platform.
Organizations and WordPress administrators should immediately implement mitigation strategies to address this vulnerability, including updating to the latest plugin version where the XSS flaws have been patched. The recommended approach involves applying the vendor-supplied security patches that properly sanitize and validate input parameters before processing them within the application context. Additionally, implementing proper output encoding mechanisms for all user-supplied data and establishing content security policies can provide additional layers of protection against exploitation attempts. Security monitoring should include detection of suspicious parameter patterns and unusual access patterns that might indicate exploitation attempts. From a defensive standpoint, this vulnerability demonstrates the importance of validating all user inputs and implementing proper sanitization routines as outlined in the OWASP Top Ten security principles. The ATT&CK framework categorizes this vulnerability under the T1059.007 technique for "Command and Scripting Interpreter: JavaScript" as attackers can leverage the XSS vulnerability to execute JavaScript code in victim browsers, potentially leading to further exploitation techniques such as credential harvesting or privilege escalation within the compromised WordPress environment.