CVE-2014-4522 in dsSearchAgent
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in client-assist.php in the dsSearchAgent: WordPress Edition plugin 1.0-beta10 and earlier for WordPress allows remote attackers to inject arbitrary web script or HTML via the action parameter.
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Analysis
by VulDB Data Team • 03/11/2019
The CVE-2014-4522 vulnerability represents a critical cross-site scripting flaw in the dsSearchAgent WordPress plugin version 1.0-beta10 and earlier. This vulnerability exists within the client-assist.php file and allows remote attackers to execute malicious web scripts or HTML code through manipulation of the action parameter. The flaw demonstrates a classic input validation failure that enables attackers to bypass security controls and inject malicious content into web applications. The vulnerability is particularly concerning because it affects a widely used WordPress plugin ecosystem, potentially compromising thousands of websites that rely on this specific version or earlier releases.
The technical implementation of this vulnerability stems from inadequate sanitization and validation of user-supplied input within the action parameter. When the client-assist.php script processes the action parameter without proper encoding or filtering mechanisms, it directly incorporates user-provided data into the web response. This creates an environment where attackers can craft malicious payloads that execute in the context of other users' browsers. The vulnerability maps directly to CWE-79, which specifically addresses Cross-Site Scripting flaws in web applications. The flaw occurs at the input processing stage where the application fails to properly validate or sanitize external data before incorporating it into dynamic web content, violating fundamental security principles of input sanitization and output encoding.
The operational impact of this vulnerability extends beyond simple script injection, potentially enabling attackers to perform session hijacking, deface websites, steal sensitive information, or redirect users to malicious sites. An attacker could exploit this vulnerability by crafting a URL with malicious JavaScript in the action parameter, which would then execute when a victim visits the affected page. This type of attack could lead to unauthorized access to user accounts, data theft, or complete compromise of the WordPress installation. The vulnerability's impact is amplified by the fact that it affects a plugin version that was widely distributed, meaning numerous websites were potentially exposed to this risk. The flaw also aligns with ATT&CK technique T1566, which covers the use of malicious payloads delivered through web applications, and T1059, which involves the execution of malicious code through scripting languages.
Mitigation strategies for CVE-2014-4522 require immediate action to address the root cause through proper input validation and output encoding practices. The most effective remediation involves updating to the latest version of the dsSearchAgent plugin where the vulnerability has been patched. Administrators should also implement comprehensive input validation that filters or encodes all user-supplied data before processing, particularly parameters that are directly incorporated into web responses. The implementation of Content Security Policy headers can provide additional defense-in-depth measures to prevent execution of unauthorized scripts. Security monitoring should include detection of suspicious URL patterns and parameter manipulation attempts. Organizations should also conduct regular vulnerability assessments of their WordPress installations to identify and remediate similar issues across their entire plugin ecosystem. The vulnerability demonstrates the critical importance of maintaining up-to-date software components and implementing proper security controls in web application development practices.