CVE-2014-4517 in CBI Referral Manager
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in getNetworkSites.php in the CBI Referral Manager plugin 1.2.1 and earlier for WordPress allows remote attackers to inject arbitrary web script or HTML via the searchString parameter.
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Analysis
by VulDB Data Team • 03/18/2019
The CVE-2014-4517 vulnerability represents a critical cross-site scripting flaw within the CBI Referral Manager WordPress plugin version 1.2.1 and earlier. This vulnerability exists in the getNetworkSites.php script which processes user input without proper sanitization or validation mechanisms. The flaw specifically manifests when the plugin handles the searchString parameter, allowing malicious actors to inject arbitrary web scripts or HTML content directly into the application's response. The vulnerability stems from inadequate input filtering that fails to properly escape or validate user-supplied data before incorporating it into dynamic web content, creating an avenue for persistent cross-site scripting attacks.
This vulnerability operates under the Common Weakness Enumeration category CWE-79 which defines improper neutralization of input during web page generation, commonly known as cross-site scripting. The attack vector specifically targets the plugin's network site retrieval functionality where user input is directly embedded into HTML output without appropriate encoding or sanitization. The vulnerability affects the broader WordPress ecosystem by providing attackers with a means to execute malicious scripts in the context of authenticated users' browsers, potentially leading to session hijacking, data theft, or unauthorized administrative actions. The flaw demonstrates a classic input validation and output encoding failure that violates fundamental web application security principles.
The operational impact of this vulnerability extends beyond simple script injection, as it enables attackers to perform sophisticated social engineering campaigns and maintain persistent access to compromised WordPress installations. Attackers can craft malicious payloads that exploit the XSS vulnerability to steal cookies, modify page content, redirect users to malicious sites, or even escalate privileges within the WordPress environment. The vulnerability's remote exploitability means that attackers do not require local access or authentication to the system, making it particularly dangerous for widely deployed WordPress installations. Additionally, the vulnerability affects not just the plugin itself but potentially the entire WordPress site, as successful exploitation could lead to complete compromise of user sessions and administrative functions.
Mitigation strategies for CVE-2014-4517 must include immediate patching of the CBI Referral Manager plugin to version 1.2.2 or later, which contains the necessary input sanitization fixes. Organizations should implement comprehensive input validation at multiple layers, including server-side validation and proper output encoding before any user-supplied content is rendered in web pages. The implementation of Content Security Policy headers can provide additional defense-in-depth measures by restricting script execution and limiting the impact of successful XSS attacks. Regular security auditing of WordPress plugins and themes remains crucial for identifying similar vulnerabilities, while maintaining updated security monitoring systems can help detect exploitation attempts. The vulnerability also underscores the importance of following secure coding practices such as those outlined in the OWASP Top Ten and the ATT&CK framework's web application attack patterns, which emphasize proper input validation and output encoding as fundamental defensive measures against XSS vulnerabilities.