CVE-2014-4576 in WordPress Social Login
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in services/diagnostics.php in the WordPress Social Login plugin 2.0.3 and earlier for WordPress allows remote attackers to inject arbitrary web script or HTML via the xhrurl parameter.
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Analysis
by VulDB Data Team • 03/11/2018
The vulnerability identified as CVE-2014-4576 represents a critical cross-site scripting flaw within the WordPress Social Login plugin version 2.0.3 and earlier. This issue resides in the services/diagnostics.php file and creates a significant security risk for WordPress installations that utilize this plugin. The vulnerability specifically affects the handling of the xhrurl parameter, which is processed without proper input sanitization or output encoding. Attackers can exploit this weakness by crafting malicious payloads that leverage the xhrurl parameter to inject arbitrary web scripts or HTML content into the application's response. The impact extends beyond simple script execution as it allows attackers to manipulate user sessions, steal sensitive information, or redirect users to malicious websites. This vulnerability demonstrates a classic lack of proper parameter validation and input sanitization, which are fundamental security practices that should be implemented at every layer of application development. The flaw exists within the plugin's diagnostic service functionality, which is typically used for troubleshooting and system monitoring purposes, making it particularly dangerous as it can be exploited during routine system operations. The vulnerability is classified under CWE-79 as a Cross-site Scripting weakness, specifically representing a reflected XSS attack vector where malicious input is immediately reflected back to users without proper sanitization.
The technical exploitation of CVE-2014-4576 occurs when an attacker crafts a malicious URL containing crafted script code within the xhrurl parameter and delivers it to unsuspecting users. When the vulnerable plugin processes this parameter, it fails to properly escape or filter the input before rendering it in the web response. This allows the injected script to execute in the context of the victim's browser, potentially leading to session hijacking, credential theft, or defacement of the affected WordPress site. The attack vector is particularly concerning because it leverages legitimate diagnostic functionality that would normally be trusted by users and administrators. The vulnerability can be exploited through various methods including email phishing campaigns, compromised websites, or social engineering tactics that direct users to malicious URLs. From an operational perspective, this vulnerability compromises the integrity of the WordPress installation and can lead to unauthorized access to user accounts, data exfiltration, and potential full system compromise if attackers can escalate privileges or gain additional footholds within the network. The flaw is particularly dangerous because it affects a widely used plugin, meaning that the attack surface is extensive and numerous WordPress sites could be vulnerable simultaneously.
Organizations affected by CVE-2014-4576 should immediately implement mitigation strategies including plugin updates to version 2.0.4 or later, which contains the necessary patches to address the XSS vulnerability. System administrators should also consider implementing additional security measures such as web application firewalls, input validation rules, and regular security audits of installed plugins. The vulnerability aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter, specifically targeting web scripting execution, and T1566 for Phishing as it can be delivered through malicious email campaigns. Security monitoring should focus on detecting unusual traffic patterns or script injection attempts in diagnostic services. The incident highlights the importance of maintaining up-to-date security patches and the critical need for proper input validation in web applications. Organizations should also implement comprehensive plugin security policies that include regular vulnerability assessments, automated scanning tools, and security configuration management. The vulnerability serves as a reminder of the critical importance of secure coding practices and the necessity of following security standards such as those outlined in the OWASP Top Ten and NIST cybersecurity frameworks. Additionally, implementing proper content security policies and output encoding mechanisms would have prevented the exploitation of this vulnerability and provided additional layers of defense against similar attacks.