CVE-2003-0481 in TUTOS
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in TUTOS 1.1 allow remote attackers to insert arbitrary web script, as demonstrated using the msg parameter to file_select.php.
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Analysis
by VulDB Data Team • 08/13/2025
The vulnerability identified as CVE-2003-0481 represents a critical cross-site scripting flaw discovered in TUTOS version 1.1, a web-based groupware application designed for collaborative environments. This vulnerability resides in the application's handling of user input parameters, specifically the msg parameter within the file_select.php script, which fails to properly sanitize or validate incoming data before processing. The flaw enables remote attackers to inject malicious web scripts into the application's response, potentially compromising user sessions and data integrity. Such vulnerabilities are particularly dangerous in collaborative platforms where multiple users interact with shared resources, as they can be exploited to manipulate the application behavior and gain unauthorized access to sensitive information. The vulnerability classification aligns with CWE-79, which defines Cross-Site Scripting as a weakness that allows attackers to inject client-side scripts into web applications, making it a fundamental security concern in web development.
The technical implementation of this vulnerability occurs when the TUTOS application processes the msg parameter without adequate input validation or output encoding mechanisms. When an attacker submits malicious script code through this parameter, the application fails to sanitize the input before incorporating it into the HTML response sent to the victim's browser. This allows the injected script to execute within the context of the victim's session, potentially enabling session hijacking, data theft, or unauthorized actions on behalf of the user. The flaw specifically affects the file_select.php component, which likely handles file selection operations and user interactions with the application's file management system. The vulnerability demonstrates poor input sanitization practices that violate established security principles and can be exploited through various attack vectors including phishing, social engineering, or direct exploitation of the application's interface.
The operational impact of CVE-2003-0481 extends beyond simple script injection, potentially enabling attackers to compromise entire user sessions and access confidential data within the TUTOS environment. When exploited, this vulnerability could allow attackers to steal user credentials, modify file permissions, access private communications, or manipulate shared resources. The attack surface is particularly concerning in groupware applications where users frequently access shared files and collaborate on sensitive projects. The vulnerability can be leveraged to create persistent threats within the application environment, as the injected scripts may remain active until the application is restarted or the affected parameter is properly sanitized. This type of vulnerability also provides attackers with opportunities to escalate privileges or move laterally within the application's access controls, making it a significant risk to overall system security and data integrity.
Security mitigations for this vulnerability should focus on implementing comprehensive input validation and output encoding mechanisms throughout the TUTOS application. The primary remediation involves sanitizing all user-supplied input parameters, particularly those used in dynamic content generation, to prevent script injection attacks. Implementing proper HTML entity encoding for all output data ensures that any potentially malicious scripts are rendered harmless when displayed to users. Additionally, developers should implement Content Security Policy headers to limit script execution and prevent unauthorized code injection. The vulnerability also highlights the importance of regular security assessments and code reviews to identify similar issues in other application components. Organizations should consider implementing web application firewalls and monitoring systems to detect and prevent exploitation attempts. This vulnerability serves as a reminder of the critical importance of secure coding practices and input validation, aligning with ATT&CK technique T1213 for credential access and T1566 for credential harvesting through social engineering and web-based attacks. The remediation process should include thorough testing to ensure that all input parameters are properly validated and that the application's response handling does not introduce new attack vectors.