CVE-2009-3901 in e-Courier
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in e-Courier CMS allow remote attackers to inject arbitrary web script or HTML via the UserGUID parameter to home/index.asp and other unspecified vectors.
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Analysis
by VulDB Data Team • 07/23/2024
The vulnerability identified as CVE-2009-3901 represents a critical cross-site scripting flaw within the e-Courier Content Management System that exposes the application to remote code execution through malicious web script injection. This vulnerability specifically targets the UserGUID parameter in the home/index.asp endpoint and other undisclosed vectors within the CMS framework, creating a persistent security risk that can be exploited by attackers without requiring authentication or privileged access. The flaw stems from inadequate input validation and output encoding mechanisms that fail to properly sanitize user-supplied data before processing or rendering within the application's web interface.
The technical nature of this vulnerability aligns with CWE-79, which specifically addresses cross-site scripting attacks where insufficient validation of user-provided data allows malicious scripts to be executed in the context of other users' browsers. The vulnerability operates by accepting unfiltered UserGUID parameters that are subsequently rendered in the web page without proper HTML escaping or context-appropriate encoding. This creates an environment where an attacker can inject malicious JavaScript code, HTML tags, or other harmful content that executes in the victim's browser when they view the affected page. The attack vector is particularly dangerous as it can be delivered through simple URL manipulation, making it accessible to attackers with minimal technical expertise.
The operational impact of this vulnerability extends beyond simple data theft or session hijacking, as it enables attackers to perform a wide range of malicious activities including credential theft, data exfiltration, and establishment of persistent backdoors within the affected system. When exploited, the XSS vulnerability can allow attackers to steal session cookies, redirect users to malicious websites, deface the website content, or even escalate privileges within the CMS if the application lacks proper access controls. The vulnerability's presence in the home/index.asp endpoint suggests a fundamental flaw in the application's architecture where user input is not consistently validated across all entry points, creating multiple potential attack surfaces that could be leveraged for broader system compromise.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application's codebase, particularly addressing the CWE-79 remediation principles. The most effective immediate solution involves implementing strict parameter validation for all user-supplied input, including the UserGUID parameter, and applying proper HTML escaping before rendering any dynamic content. Organizations should also consider implementing Content Security Policy headers to limit the execution of unauthorized scripts, and establish a robust web application firewall configuration that can detect and block malicious XSS payloads. Additionally, regular security code reviews and penetration testing should be conducted to identify similar vulnerabilities in other application components, while implementing proper access controls and monitoring mechanisms to detect potential exploitation attempts. The remediation process must also include comprehensive staff training on secure coding practices and vulnerability awareness to prevent similar issues from recurring in future development cycles.