CVE-2006-7137 in TinyPortal
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in TinyPortal before 0.8.6 allows remote attackers to inject arbitrary web script or HTML via the shoutbox.
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Analysis
by VulDB Data Team • 10/10/2017
The CVE-2006-7137 vulnerability represents a critical cross-site scripting flaw discovered in the TinyPortal content management system prior to version 0.8.6. This vulnerability specifically targets the shoutbox functionality, which serves as a user interaction feature allowing visitors to post messages or comments on a website. The flaw enables remote attackers to inject malicious web scripts or HTML code directly into the shoutbox interface, potentially compromising user sessions and data integrity. The vulnerability stems from insufficient input validation and output sanitization within the shoutbox component, creating an exploitable entry point for malicious actors to execute arbitrary code in the context of other users' browsers.
The technical nature of this vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in software applications. This classification indicates that the vulnerability occurs when an application incorporates untrusted data into web pages without proper validation or encoding, allowing attackers to inject malicious scripts that execute in the victim's browser. The attack vector operates through the injection of malicious payloads into the shoutbox input fields, where user-supplied content is not adequately sanitized before being rendered back to other users. This creates a persistent XSS vulnerability where the malicious code becomes part of the website's content and executes whenever other users view the affected shoutbox section.
The operational impact of this vulnerability extends beyond simple script injection, as it can enable sophisticated attack chains including session hijacking, credential theft, and redirection to malicious sites. Attackers can craft payloads that steal cookies, redirect users to phishing pages, or even inject malware delivery mechanisms that exploit browser vulnerabilities. The shoutbox feature typically serves as a public-facing element where multiple users can interact, amplifying the potential damage since malicious code can affect numerous visitors simultaneously. This vulnerability undermines the trust model of web applications by allowing unauthorized code execution within the context of legitimate user sessions, potentially leading to complete account compromise and data breaches.
Security professionals should prioritize immediate remediation through updating TinyPortal to version 0.8.6 or later, which includes proper input validation and output encoding mechanisms. The mitigation strategy should also incorporate comprehensive input sanitization of all user-supplied data, implementing proper HTML escaping techniques for dynamic content rendering, and establishing robust content security policies. Organizations should also consider implementing web application firewalls to detect and block suspicious script injection attempts, while conducting regular security assessments of all web application components. The vulnerability demonstrates the critical importance of proper input validation and output encoding practices as outlined in the OWASP Top Ten and ATT&CK framework's T1203 technique for exploitation of web application vulnerabilities. Regular security audits and code reviews focusing on user input handling mechanisms are essential to prevent similar vulnerabilities from emerging in other application components.