CVE-2014-4542 in Ooorl
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in redirect.php in the Ooorl plugin for WordPress allows remote attackers to inject arbitrary web script or HTML via the url parameter.
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Analysis
by VulDB Data Team • 03/17/2019
The CVE-2014-4542 vulnerability represents a critical cross-site scripting flaw within the Ooorl WordPress plugin that exposes websites to remote code execution risks through malicious web script injection. This vulnerability specifically targets the redirect.php component of the plugin, which serves as a URL redirection service for the WordPress platform. The flaw arises from insufficient input validation and sanitization of the url parameter, creating an avenue for attackers to inject malicious payloads that can execute in the context of other users' browsers. The Ooorl plugin, designed to provide short URL functionality, becomes a vector for attackers to exploit the XSS vulnerability by crafting malicious URLs that contain script code within the url parameter. This vulnerability falls under CWE-79 which categorizes cross-site scripting flaws as one of the most prevalent web application security issues, with the specific weakness being the failure to properly escape or validate user-supplied input before rendering it in web pages. The attack surface is particularly concerning as it allows threat actors to manipulate the plugin's redirection functionality to serve malicious content to unsuspecting users who click on the crafted links.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious URL containing script code within the url parameter of the redirect.php endpoint. When a victim accesses this specially crafted URL, the vulnerable plugin fails to sanitize the input properly, allowing the injected script to execute in the victim's browser within the context of the vulnerable WordPress site. The XSS payload can range from simple cookie theft mechanisms to more sophisticated attacks such as session hijacking, defacement of web pages, or redirection to malicious sites that can further exploit the victim's browser. This vulnerability enables attackers to bypass traditional security controls by leveraging the legitimate plugin functionality to deliver malicious content. The impact is particularly severe because the Ooorl plugin operates within the WordPress ecosystem, meaning that successful exploitation can potentially lead to complete compromise of user sessions and unauthorized access to administrative functions. The vulnerability demonstrates a classic lack of proper input sanitization practices that aligns with ATT&CK technique T1566.001 which covers the use of malicious links and redirects as initial access vectors.
The operational impact of CVE-2014-4542 extends beyond simple script injection to encompass potential data breaches, session hijacking, and complete compromise of user accounts within the WordPress environment. When exploited, this vulnerability allows attackers to steal session cookies, potentially gaining administrative access to WordPress sites that utilize the vulnerable plugin. The threat actor can also manipulate the redirection behavior to direct users to phishing sites or malicious download pages, creating a broader attack surface. Organizations running vulnerable WordPress installations become susceptible to various secondary attacks including credential harvesting, data exfiltration, and further propagation within the network. The vulnerability's persistence is heightened because the Ooorl plugin may be used across multiple sites, amplifying the potential damage. Security researchers have noted that this type of vulnerability often goes undetected for extended periods due to the complexity of web application security testing and the difficulty in identifying input validation gaps. The vulnerability also demonstrates the importance of proper security testing and input validation as outlined in OWASP Top 10 A03:2021 which addresses injection flaws, including XSS vulnerabilities that can be exploited through parameter manipulation. Organizations should implement comprehensive monitoring and patch management strategies to address this vulnerability promptly, as the window for exploitation remains open until the plugin is updated or the vulnerability is patched through official security releases.
Mitigation strategies for CVE-2014-4542 require immediate action including patching the vulnerable Ooorl plugin to the latest secure version that addresses the input validation issues. System administrators should conduct comprehensive vulnerability assessments to identify all instances of the vulnerable plugin across their WordPress installations and ensure that all plugins are regularly updated from trusted sources. The implementation of Content Security Policy headers can provide additional protection against XSS attacks by restricting the sources from which scripts can be loaded, though this should be considered a supplementary defense rather than a primary fix. Input validation and output encoding should be implemented at multiple layers including server-side validation of all user-supplied parameters and proper HTML escaping of dynamic content. Organizations should also implement web application firewalls that can detect and block malicious payloads targeting known XSS patterns. Regular security audits and penetration testing should include thorough examination of plugin functionality, particularly redirect and URL handling mechanisms, to identify similar vulnerabilities. The vulnerability underscores the necessity of maintaining updated security practices and the importance of following secure coding guidelines that prevent XSS through proper input sanitization and output encoding techniques. Additionally, user education regarding suspicious links and the importance of verifying URL authenticity can help reduce the success rate of exploitation attempts. The remediation process should include comprehensive testing to ensure that the patch does not introduce compatibility issues with existing site functionality while maintaining the intended redirection capabilities of the plugin.