CVE-2015-9384 in relevant Plugin
Summary
by MITRE
The relevant plugin before 1.0.8 for WordPress has XSS.
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Analysis
by VulDB Data Team • 12/26/2023
The vulnerability identified as CVE-2015-9384 affects a WordPress plugin that was susceptible to cross-site scripting attacks through versions prior to 1.0.8. This issue represents a critical security flaw that allows attackers to inject malicious scripts into web pages viewed by other users. The vulnerability stems from inadequate input validation and output sanitization within the plugin's codebase, creating an environment where user-supplied data can be executed as script code in the context of the victim's browser.
The technical implementation of this vulnerability occurs when the plugin fails to properly sanitize user input before rendering it in web pages. This weakness enables attackers to craft malicious payloads that exploit the plugin's handling of parameters or form inputs, allowing them to execute arbitrary JavaScript code in the browsers of unsuspecting users. The flaw typically manifests when user-provided data is directly embedded into HTML output without proper encoding or validation, creating a pathway for malicious script injection. This type of vulnerability falls under CWE-79 which specifically addresses cross-site scripting flaws in web applications, making it a prime target for attackers seeking to compromise user sessions or redirect them to malicious sites.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform session hijacking, deface websites, steal sensitive information, or redirect users to phishing sites. When exploited, the vulnerability allows unauthorized individuals to manipulate the plugin's functionality and potentially gain elevated privileges within the affected WordPress environment. The attack surface is particularly concerning because WordPress plugins often have broad access to site functionality and user data, making them attractive targets for cybercriminals. This vulnerability can be leveraged to compromise not just individual user sessions but potentially entire websites, especially when combined with other exploitation techniques or when the plugin has administrative capabilities.
Mitigation strategies for this vulnerability require immediate patching to version 1.0.8 or later, which should include proper input validation and output encoding mechanisms. Organizations should implement comprehensive security testing procedures including dynamic application security testing and manual code review to identify similar vulnerabilities in other plugins or custom code. The implementation of Content Security Policy headers can provide additional defense-in-depth measures to prevent script execution from unauthorized sources. Security teams should also establish monitoring procedures to detect unusual plugin behavior or unauthorized modifications that might indicate exploitation attempts. According to ATT&CK framework, this vulnerability maps to T1566 which covers social engineering techniques including spearphishing with malicious attachments, though the specific exploitation method here involves direct code injection rather than user interaction. Regular security audits of WordPress installations and plugin management practices are essential for maintaining defense against similar vulnerabilities.