CVE-2003-0483 in XMB
Summary
by MITRE
Cross-site scripting (XSS) vulnerabilities in XMB Forum 1.8 Partagium allow remote attackers to insert arbitrary script via (1) the member parameter to member.php or (2) the action parameter to buddy.php.
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Analysis
by VulDB Data Team • 01/21/2025
The vulnerability identified as CVE-2003-0483 represents a critical cross-site scripting flaw in the XMB Forum 1.8 Partagium software, specifically affecting the member.php and buddy.php scripts. This vulnerability resides in the web application's input validation mechanisms and allows remote attackers to inject malicious scripts into web pages viewed by other users. The flaw manifests when the application fails to properly sanitize user-supplied input parameters, creating an avenue for attackers to execute arbitrary code within the context of the victim's browser session.
The technical implementation of this vulnerability occurs through two distinct attack vectors that exploit the same underlying flaw in the application's parameter handling. The first vector targets the member parameter in member.php where user input is directly incorporated into the page output without adequate sanitization or encoding. The second vector operates through the action parameter in buddy.php, where similar input processing issues allow script injection. Both attack paths demonstrate the classic XSS vulnerability pattern where unfiltered user input flows directly into dynamic web content, violating fundamental web security principles. This vulnerability type maps directly to CWE-79 which defines Cross-Site Scripting as a weakness where untrusted data is incorporated into web pages without proper validation or encoding, and specifically aligns with CWE-79-2 which addresses cases where user-controllable data is passed to a web page without proper sanitization.
The operational impact of this vulnerability extends beyond simple script execution, as it enables attackers to perform session hijacking, steal sensitive user information, redirect victims to malicious websites, or manipulate forum functionality. When a user visits a compromised page, the injected scripts execute in their browser context, potentially allowing attackers to access cookies, session tokens, or other sensitive data that the user might have in their browser. The vulnerability particularly affects forum users who may be logged in with administrative privileges, as successful exploitation could lead to complete account compromise or unauthorized administrative actions. This represents a significant threat to user privacy and forum integrity, as the attack can be executed without requiring any special privileges from the victim beyond visiting a maliciously crafted URL.
Mitigation strategies for this vulnerability must address the core issue of inadequate input validation and output encoding. The most effective approach involves implementing comprehensive input sanitization that filters or encodes all user-supplied data before it is processed or displayed in web pages. This includes applying proper HTML entity encoding to any data that will be rendered in the browser context, ensuring that special characters such as <, >, &, ", and ' are properly escaped. Additionally, developers should implement proper parameter validation that restricts input to expected formats and lengths, while also employing Content Security Policy (CSP) headers to limit script execution sources. The vulnerability also highlights the importance of following secure coding practices and adhering to established security frameworks such as those recommended in the OWASP Top Ten, which categorizes this type of vulnerability as a critical security risk requiring immediate remediation. Organizations should also consider implementing web application firewalls and regular security scanning to detect similar vulnerabilities in other applications and maintain overall security posture.