CVE-2003-1238 in Nuked-Klan
Summary
by MITRE
Cross-site scripting vulnerability (XSS) in Nuked-Klan 1.3 beta and earlier allows remote attackers to steal authentication information via cookies by injecting arbitrary HTML or script into op of the (1) Team, (2) News, and (3) Liens modules.
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Analysis
by VulDB Data Team • 07/16/2025
The vulnerability identified as CVE-2003-1238 represents a critical cross-site scripting flaw affecting Nuked-Klan version 1.3 beta and earlier installations. This security weakness resides within the web application's input validation mechanisms, specifically within three core modules: Team, News, and Liens. The flaw allows remote attackers to execute malicious scripts in the context of authenticated users' browsers, potentially compromising sensitive authentication data stored in cookies. The vulnerability stems from insufficient sanitization of user-supplied input parameters, particularly those processed through the 'op' parameter in the affected modules. This type of vulnerability falls under the CWE-79 category, which specifically addresses cross-site scripting flaws where applications fail to properly validate or escape user input before incorporating it into dynamically generated web pages.
The technical exploitation of this vulnerability occurs when an attacker crafts malicious input containing HTML or JavaScript code and submits it through the vulnerable parameters within the Team, News, or Liens modules. When the application processes this input without proper sanitization, the malicious code gets embedded into the web page output and executed within the browser context of any user who views the affected content. The attack vector is particularly dangerous because it targets authentication cookies, which contain session identifiers and other sensitive information that could be harvested by attackers. This allows for session hijacking attacks where an attacker can impersonate legitimate users and gain unauthorized access to protected resources within the Nuked-Klan application. The vulnerability demonstrates a classic lack of output encoding and input validation that violates fundamental secure coding practices.
The operational impact of CVE-2003-1238 extends beyond simple data theft, as it enables attackers to perform a range of malicious activities including session hijacking, credential theft, and potential privilege escalation within the application. An attacker who successfully exploits this vulnerability can steal session cookies that contain authentication tokens, effectively allowing them to impersonate any user who accesses the compromised pages. This poses significant risks to the confidentiality and integrity of the application's user data and administrative functions. The attack requires minimal technical expertise to execute and can be automated, making it particularly dangerous for web applications with widespread user interaction. Organizations using affected versions of Nuked-Klan face potential data breaches, unauthorized access to administrative functions, and compromise of user accounts that could lead to further system infiltration.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term architectural improvements to prevent similar issues. The primary fix involves implementing comprehensive input validation and output encoding mechanisms throughout the affected modules, ensuring all user-supplied data is properly sanitized before being processed or displayed. This includes implementing proper HTML escaping for all dynamic content and validating input parameters against strict whitelists of acceptable characters and formats. Organizations should also consider implementing content security policies to limit script execution and employing secure coding practices that align with the OWASP Top Ten security requirements. Additionally, regular security assessments and code reviews should be conducted to identify and remediate similar vulnerabilities across the entire application stack. The vulnerability demonstrates the critical importance of maintaining up-to-date security patches and following secure development lifecycle practices to prevent such widespread exploitation opportunities that can lead to complete system compromise.