CVE-2006-5129 in JAF CMS
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in ph03y3nk just another flat file (JAF) CMS 4.0 RC1 allow remote attackers to inject arbitrary web script or HTML via (1) the message parameter, and possibly other parameters, in module/shout/jafshout.php (aka the shoutbox); and (2) the message body in a forum post in module/forum/topicwin.php, related to the name, email, title, date, ldate, and lname variables.
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Analysis
by VulDB Data Team • 04/23/2026
The vulnerability identified as CVE-2006-5129 represents a critical cross-site scripting weakness in the ph03y3nk just another flat file CMS version 4.0 RC1, exposing the system to remote code execution risks through malicious web script injection. This vulnerability manifests in two distinct attack vectors within the CMS's core modules, specifically targeting the shoutbox functionality and forum posting mechanisms. The first vector occurs in the module/shout/jafshout.php file where the message parameter fails to properly sanitize user input, while the second vector affects the module/forum/topicwin.php file where multiple variables including name, email, title, date, ldate, and lname in forum post messages remain unprotected against malicious script injection attempts.
The technical flaw stems from inadequate input validation and output sanitization practices within the CMS's processing logic, where user-supplied data flows directly into HTML output without proper encoding or filtering mechanisms. This weakness falls under the CWE-79 category of Cross-Site Scripting, specifically manifesting as stored XSS vulnerabilities since the malicious scripts can be permanently stored within the CMS database and executed whenever affected pages are accessed. The vulnerability allows attackers to inject malicious JavaScript code, HTML tags, or other client-side scripts that execute in the context of other users' browsers, potentially leading to session hijacking, credential theft, or redirection to malicious websites.
The operational impact of this vulnerability extends beyond simple data corruption or display issues, as it creates a persistent threat vector that can be exploited by remote attackers to compromise user sessions and potentially gain unauthorized access to the CMS administrative interface. When users browse the shoutbox or forum sections, their browsers execute the injected malicious scripts, which can capture cookies, redirect users to phishing sites, or perform actions on behalf of authenticated users. This vulnerability particularly affects the CMS's user trust model since legitimate users unknowingly become vectors for propagating malicious content throughout the platform.
Security professionals should implement comprehensive input validation and output encoding measures to address this vulnerability, ensuring that all user-supplied data undergoes proper sanitization before being stored or displayed. The recommended mitigations include implementing strict whitelist-based input filtering, employing proper HTML entity encoding for all dynamic content, and applying the principle of least privilege in CMS configurations. Organizations should also consider implementing Content Security Policy headers to limit script execution and establish regular security audits of CMS components. This vulnerability aligns with ATT&CK technique T1566.001 for initial access through malicious web content, making it particularly dangerous for organizations relying on user-generated content platforms. The remediation process requires immediate patching of the affected CMS version, followed by comprehensive security testing to ensure no other similar vulnerabilities exist within the platform's codebase.