CVE-2006-5713 in Web Server
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Easy File Sharing (EFS) Web Server 4.0 allows remote attackers to inject arbitrary web script or HTML via the (1) author, (2) content, or (3) title parameters when posting a forum thread. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.
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Analysis
by VulDB Data Team • 04/26/2026
The CVE-2006-5713 vulnerability represents a critical cross-site scripting flaw within the Easy File Sharing Web Server version 4.0, specifically targeting the forum posting functionality. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is one of the most prevalent and dangerous web application security weaknesses identified by the Common Weakness Enumeration project. The flaw exists in the server's handling of user input parameters during forum thread creation, making it particularly dangerous for collaborative web environments where users regularly post content.
The technical implementation of this vulnerability occurs through three specific parameter injection points: author, content, and title fields when submitting forum threads. Attackers can exploit this weakness by crafting malicious payloads that contain embedded JavaScript code or HTML elements within these parameters. When other users view the affected forum posts, their browsers execute the injected scripts, potentially leading to session hijacking, credential theft, or redirection to malicious websites. The vulnerability's remote exploitability means attackers do not require local access or authentication to carry out attacks, making it particularly dangerous for publicly accessible web forums.
The operational impact of CVE-2006-5713 extends beyond simple script execution, as it can enable sophisticated attack vectors that align with multiple ATT&CK techniques including T1566 for credential harvesting and T1059 for command and control communications. The vulnerability affects the integrity and confidentiality of user data within the web server environment, potentially allowing attackers to establish persistent access to user sessions and compromise the entire forum ecosystem. Organizations using Easy File Sharing Web Server 4.0 face significant risk of data breaches and reputation damage when this vulnerability remains unpatched, particularly in environments where user-generated content is prevalent.
Mitigation strategies for this vulnerability should prioritize immediate patching of the Easy File Sharing Web Server to the latest available version that addresses the XSS flaws in the forum posting functionality. Input validation and output encoding should be implemented at multiple layers, with proper sanitization of all user-supplied data before storage or display. Security headers including Content Security Policy should be configured to prevent unauthorized script execution, while web application firewalls can provide additional protection against known attack patterns. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other web applications, as this flaw demonstrates the importance of proper input validation in web server implementations. The vulnerability serves as a reminder of the critical importance of secure coding practices and the need for comprehensive security testing throughout the software development lifecycle.