CVE-2008-2126 in Tux CMS
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in Tux CMS 0.1 allow remote attackers to inject arbitrary web script or HTML via the (1) q parameter to index.php and the (2) returnURL parameter to tux-login.php.
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Analysis
by VulDB Data Team • 10/31/2025
The vulnerability identified as CVE-2008-2126 represents a critical security flaw in Tux CMS version 0.1 that exposes the system to multiple cross-site scripting attacks. This vulnerability affects two distinct input parameters within the CMS framework, creating pathways for malicious actors to execute unauthorized code within the context of user sessions. The presence of these XSS vulnerabilities fundamentally compromises the integrity and security of the content management system, potentially allowing attackers to hijack user sessions, deface websites, or redirect users to malicious content.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding mechanisms within the Tux CMS application. Specifically, the q parameter in index.php and the returnURL parameter in tux-login.php fail to properly sanitize user-supplied data before incorporating it into web responses. This lack of proper input sanitization creates opportunities for attackers to inject malicious scripts that execute in the victim's browser when processing the vulnerable parameters. The vulnerability manifests as reflected XSS, where malicious payloads are immediately reflected back to users through web responses without proper encoding or validation.
From an operational perspective, this vulnerability presents significant risks to organizations utilizing Tux CMS 0.1. Attackers can exploit these flaws to steal session cookies, redirect users to phishing sites, or inject malicious content that appears legitimate to end users. The impact extends beyond simple data theft, as these vulnerabilities can enable more sophisticated attacks such as credential theft, session hijacking, and persistent XSS attacks that compromise user accounts. The reflected nature of these vulnerabilities means that exploitation requires user interaction with malicious links, but the ease of implementation makes them particularly dangerous in targeted campaigns.
The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws in web applications, and demonstrates characteristics consistent with ATT&CK technique T1566 related to phishing attacks through malicious links. Organizations should implement immediate mitigations including input validation and output encoding for all user-supplied parameters, particularly those used in URL query strings and form submissions. The recommended approach involves implementing strict input validation that rejects or sanitizes potentially malicious content before processing, combined with proper output encoding that prevents script execution in web responses. Additionally, implementing Content Security Policy headers and using secure session management practices can provide additional layers of protection against exploitation of these vulnerabilities.
The broader implications of this vulnerability highlight the importance of proper input validation in web applications and demonstrate how seemingly simple parameter handling can create significant security risks. This vulnerability serves as a reminder of the critical need for comprehensive security testing and code review practices in content management systems, particularly those handling user input through URL parameters. Organizations should conduct thorough security assessments of their web applications to identify similar input validation weaknesses and implement robust security controls to prevent exploitation of such vulnerabilities.