CVE-2010-4516 in JXtended Comments
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in the JXtended Comments component before 1.3.1 for Joomla allow remote attackers to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 03/02/2018
The vulnerability identified as CVE-2010-4516 represents a critical security flaw within the JXtended Comments component for Joomla platforms, specifically affecting versions prior to 1.3.1. This issue manifests as multiple cross-site scripting vulnerabilities that create exploitable entry points for malicious actors seeking to compromise web applications. The vulnerability stems from inadequate input validation and output sanitization mechanisms within the component's codebase, allowing attackers to inject malicious scripts into web pages viewed by other users.
Cross-site scripting vulnerabilities of this nature fall under the Common Weakness Enumeration category CWE-79, which specifically addresses the improper neutralization of input during web page generation. The flaw exists in the component's handling of user-supplied data, where insufficient sanitization processes fail to properly encode or escape special characters that could be interpreted as executable script code. Attackers can exploit these vectors by crafting malicious input that gets stored or reflected in web pages, thereby executing arbitrary scripts in the context of other users' browsers. The unspecified vectors mentioned in the description suggest that multiple entry points within the component's functionality could be exploited, potentially including comment submission forms, user profile fields, or other interactive elements that process user input.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform various malicious activities including session hijacking, credential theft, data exfiltration, and defacement of web content. When users browse pages containing the injected scripts, their browsers execute the malicious code, potentially allowing attackers to steal cookies, session tokens, or other sensitive information. The vulnerability particularly affects Joomla installations where the JXtended Comments component is actively used, making it a significant concern for content management systems that rely on user-generated content features. The attack surface is further expanded due to the component's widespread use within the Joomla ecosystem, potentially affecting numerous websites and applications that depend on this particular module for comment management functionality.
Mitigation strategies for CVE-2010-4516 primarily involve upgrading to the patched version 1.3.1 or later of the JXtended Comments component, which implements proper input validation and output sanitization measures. Security administrators should also implement comprehensive input filtering mechanisms, including the application of context-specific encoding techniques for all user-supplied data before rendering it in web pages. Additionally, the implementation of Content Security Policy headers can provide an additional layer of protection by restricting the sources from which scripts can be executed. Organizations should conduct regular security assessments of their Joomla installations, ensuring all third-party components are kept up to date and regularly audited for security vulnerabilities. The ATT&CK framework categorizes this vulnerability under the T1059.007 technique, which involves the use of scripting languages to execute malicious code, and the T1566 technique related to spearphishing attacks that may leverage such vulnerabilities to establish persistent access to target systems.