CVE-2006-6522 in TwoZero
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in WikiTimeScale TwoZero before 2.31 allow remote attackers to inject arbitrary web script or HTML via unspecified vectors in the (1) forum module and (2) event descriptions. NOTE: some of these details are obtained from third party information.
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Analysis
by VulDB Data Team • 08/10/2018
The vulnerability identified as CVE-2006-6522 represents a critical cross-site scripting flaw affecting WikiTimeScale TwoZero versions prior to 2.31. This vulnerability manifests in two distinct attack vectors within the application's forum module and event descriptions functionality, creating multiple pathways for malicious actors to execute arbitrary web scripts or HTML code within the context of affected user sessions. The vulnerability stems from insufficient input validation and output encoding mechanisms that fail to properly sanitize user-supplied data before rendering it within the web application's interface. This weakness allows attackers to inject malicious payloads that persist in the application's database and subsequently execute when other users view the affected content, making it a classic persistent cross-site scripting vulnerability that operates at the application layer.
The technical exploitation of this vulnerability leverages the fundamental principle that web applications must treat all user input as untrusted and properly sanitize it before processing or displaying. In the case of WikiTimeScale TwoZero, the forum module and event description fields appear to accept user-generated content without adequate sanitization, creating opportunities for attackers to embed malicious scripts that can execute in the browsers of other users who interact with the compromised content. The vulnerability's classification as a persistent XSS flaw means that once injected, the malicious code remains active and executable until manually removed from the database or the application is updated to address the issue. This persistence characteristic significantly amplifies the attack's impact and makes the vulnerability particularly dangerous in collaborative environments where users frequently interact with forum posts and event descriptions.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform a wide range of malicious activities including session hijacking, credential theft, data exfiltration, and redirection to malicious sites. When users with elevated privileges interact with compromised forum content or event descriptions, attackers may gain access to sensitive information or administrative capabilities within the application. The vulnerability affects the application's integrity and confidentiality by allowing unauthorized code execution, potentially compromising the entire user base that accesses the vulnerable functionality. From a security perspective, this vulnerability represents a failure in the application's defense-in-depth strategy, as it demonstrates insufficient input validation and output encoding controls that should be implemented at multiple layers of the application architecture.
Mitigation strategies for this vulnerability require immediate implementation of proper input sanitization and output encoding mechanisms throughout the application's codebase, particularly in the forum module and event description handling components. The recommended approach involves implementing comprehensive data validation that filters or escapes special characters in user-supplied input before storing it in the database, combined with proper HTML encoding when rendering content back to users. Organizations should implement Content Security Policy headers to add an additional layer of protection against script execution, and establish regular security testing procedures including automated scanning and manual penetration testing to identify similar vulnerabilities. The vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws, and represents a clear violation of the principle that applications should never trust user input without proper sanitization. From an ATT&CK framework perspective, this vulnerability maps to techniques involving command and control communication and credential access through malicious code execution, potentially enabling more sophisticated attacks if exploited by threat actors. The vulnerability's remediation should include a comprehensive review of all user input handling mechanisms and implementation of a robust security framework that prevents similar issues from occurring in the future, as the presence of such flaws indicates broader architectural security weaknesses that require systematic addressing.