CVE-2014-4520 in DMCA WaterMarker
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in phprack.php in the DMCA WaterMarker plugin before 1.1 for WordPress allows remote attackers to inject arbitrary web script or HTML via the plugin_dir parameter.
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Analysis
by VulDB Data Team • 03/11/2018
The CVE-2014-4520 vulnerability represents a classic cross-site scripting flaw within the DMCA WaterMarker WordPress plugin, specifically affecting versions prior to 1.1. This vulnerability exists in the phprack.php file and demonstrates a critical weakness in input validation and output encoding practices. The flaw enables remote attackers to execute malicious scripts in the context of affected websites, potentially compromising user sessions and data integrity. The vulnerability is particularly concerning because it targets a widely used content management system platform where plugins often handle user-provided data without adequate sanitization measures.
The technical implementation of this XSS vulnerability occurs through the improper handling of the plugin_dir parameter within the phprack.php script. When users provide input through this parameter, the application fails to properly sanitize or encode the data before incorporating it into dynamic web content. This allows attackers to inject malicious JavaScript code that gets executed in the browsers of unsuspecting users who visit affected pages. The vulnerability follows the CWE-79 pattern of cross-site scripting, where the application fails to validate or escape user-controllable data before including it in generated output. Attackers can leverage this weakness to perform session hijacking, defacement of web pages, or redirect users to malicious sites.
The operational impact of CVE-2014-4520 extends beyond simple script injection, as it can lead to complete compromise of WordPress installations when combined with other attack vectors. An attacker who successfully exploits this vulnerability can potentially escalate privileges, steal administrator credentials, or modify website content without authorization. The vulnerability affects the core security model of WordPress plugins by allowing arbitrary code execution in the context of legitimate users. This represents a significant risk to website owners since the DMCA WaterMarker plugin was likely installed on numerous sites, creating a wide attack surface. The vulnerability also aligns with ATT&CK technique T1566.001 for initial access through malicious web content, making it a prime target for automated exploitation campaigns.
Mitigation strategies for this vulnerability require immediate plugin updates to version 1.1 or later, which should include proper input validation and output encoding mechanisms. System administrators should implement comprehensive security monitoring to detect potential exploitation attempts and ensure all WordPress plugins remain current with security patches. The fix should incorporate strict parameter validation and HTML escaping techniques to prevent malicious input from being processed as executable code. Additionally, organizations should consider implementing web application firewalls to detect and block suspicious parameter values, and conduct regular security audits of installed plugins to identify similar vulnerabilities. The remediation process should also include educating users about the risks of installing unverified plugins and maintaining updated security practices. This vulnerability underscores the importance of following secure coding practices and adhering to established security frameworks that prevent injection attacks through proper data validation and sanitization.