CVE-2004-0337 in 602pro LAN SUITE
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in LAN SUITE Web Mail 602Pro allows remote attackers to execute arbitrary script or HTML as other users via a URL to index.html, followed by a / (slash) and the desired script. NOTE: the vendor states that this bug could not be reproduced, so this issue may be REJECTed in the future.
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Analysis
by VulDB Data Team • 10/08/2025
The vulnerability described in CVE-2004-0337 represents a classic cross-site scripting flaw within the LAN SUITE Web Mail 602Pro application that poses significant security risks to web-based email systems. This type of vulnerability falls under the broader category of injection attacks and specifically aligns with CWE-79 which defines Cross-Site Scripting as a weakness that allows attackers to inject malicious scripts into web applications that are then executed by other users. The vulnerability manifests in the application's handling of URL parameters, specifically when processing requests to the index.html endpoint followed by a forward slash and malicious script content.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious URL that includes executable script code within the path parameter of the application's web interface. When a victim user clicks on this crafted link, the web application fails to properly sanitize or escape the input before rendering it in the browser context. This allows the malicious script to execute within the victim's browser session, potentially compromising their security and privacy. The vulnerability is particularly concerning because it operates at the application layer, targeting the web interface directly rather than relying on underlying system vulnerabilities or network protocols.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform various malicious activities including session hijacking, credential theft, data exfiltration, and unauthorized actions performed on behalf of the victim user. The attack vector demonstrates how web applications can be exploited through seemingly innocuous URL manipulation, making it difficult for users to identify potentially dangerous links. From a cybersecurity perspective, this vulnerability represents a critical weakness that could be exploited in phishing campaigns or social engineering attacks, where attackers might distribute malicious links to compromise user sessions and gain unauthorized access to email accounts.
Security professionals should note that while the vendor has stated they could not reproduce the bug, this does not eliminate the potential risk to systems that may be vulnerable to this class of attack. The vulnerability's classification as potentially being rejected in future CVE databases highlights the importance of thorough testing and validation of security issues. Organizations using LAN SUITE Web Mail 602Pro should implement proper input validation and output encoding mechanisms to prevent such vulnerabilities, following the principle of least privilege and ensuring that all user-supplied data is properly sanitized before being processed or displayed. The recommended mitigations include implementing proper content security policies, utilizing secure coding practices that prevent XSS vulnerabilities, and conducting regular security assessments of web applications to identify and remediate similar weaknesses in the application's input handling mechanisms.
The vulnerability also demonstrates the importance of following established security frameworks such as those outlined in the ATT&CK matrix, where this weakness would be categorized under the application layer attack techniques. The specific exploitation pattern aligns with techniques that involve manipulating web application inputs to execute malicious code, representing a fundamental flaw in the application's security architecture that requires comprehensive remediation rather than simple patching approaches. Organizations should also consider implementing web application firewalls and monitoring systems to detect and prevent such attacks, as well as ensuring that all web applications undergo proper security testing and validation processes before deployment.