CVE-2009-4505 in OAMP Comments
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in OpenCMS OAMP Comments Module 1.0.1 allow remote attackers to inject arbitrary web script or HTML via the name field in a comment, and other unspecified vectors.
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Analysis
by VulDB Data Team • 05/03/2026
The vulnerability identified as CVE-2009-4505 represents a critical cross-site scripting flaw within the OpenCMS OAMP Comments Module version 1.0.1. This security weakness exposes web applications utilizing the OpenCMS platform to potential exploitation by remote attackers who can inject malicious scripts into comment fields. The vulnerability specifically targets the name field within comment submissions, creating an avenue for attackers to execute arbitrary web scripts or HTML code within the context of other users' browsers. The affected module operates as part of the OpenCMS content management system, which is widely deployed for enterprise web applications requiring content management capabilities. This particular vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is classified as a fundamental web application security flaw that allows attackers to inject client-side scripts into web pages viewed by other users. The attack vector demonstrates how user input validation mechanisms were insufficiently implemented within the comment submission process, creating a persistent security gap that could be exploited across multiple user sessions.
The technical implementation of this vulnerability stems from inadequate sanitization of user input within the comments module's processing pipeline. When users submit comments through the web interface, the system fails to properly validate or escape special characters in the name field, allowing malicious payloads to be stored and subsequently executed when other users view the comment. This flaw operates at the application layer and specifically affects the rendering of user-generated content without proper context-aware encoding. The unspecified vectors mentioned in the description suggest that additional attack surfaces within the same module may also be vulnerable to similar injection techniques, indicating a broader architectural weakness in the input handling mechanisms. The vulnerability can be exploited through various script payloads including javascript code, html tags, and potentially more sophisticated attack vectors that leverage browser-specific behaviors. According to ATT&CK framework, this vulnerability maps to T1203 - Exploitation for Client Execution, where adversaries leverage web application vulnerabilities to execute malicious code in the context of a victim's browser session. The attack requires no privileged access and can be executed entirely through web-based interfaces, making it particularly dangerous in environments where user-generated content is common.
The operational impact of CVE-2009-4505 extends beyond simple data theft or defacement, as it enables attackers to perform session hijacking, redirect users to malicious sites, or harvest sensitive information from authenticated sessions. When exploited, this vulnerability allows attackers to impersonate legitimate users, potentially gaining access to restricted content or performing unauthorized actions within the application. The persistent nature of stored XSS vulnerabilities means that the malicious scripts remain active until the affected comments are removed from the system, creating long-term exposure windows. Organizations using OpenCMS with the vulnerable comments module face significant risks including data breaches, service disruption, and potential compliance violations under various regulatory frameworks such as gdpr, hipaa, or pci dss. The vulnerability affects not only the immediate web application but also the broader user trust and brand reputation of organizations relying on OpenCMS for their digital presence. Attackers can leverage this vulnerability to create persistent backdoors within user sessions, enabling long-term surveillance or data exfiltration activities. The impact is particularly severe in enterprise environments where OpenCMS is used for internal collaboration platforms or customer-facing applications where user-generated content is frequently submitted.
Mitigation strategies for CVE-2009-4505 require immediate implementation of input validation and output encoding mechanisms within the OpenCMS comments module. Organizations should implement comprehensive sanitization of all user input fields, particularly those used for comment submissions, by employing context-aware encoding techniques that prevent script execution in HTML contexts. The recommended approach includes implementing proper HTML escaping, using content security policies, and deploying web application firewalls to detect and block malicious payloads. System administrators should upgrade to patched versions of OpenCMS OAMP Comments Module as soon as available, with the vulnerability being addressed through proper input validation and output encoding implementations. Security teams should conduct thorough vulnerability assessments to identify other potential XSS vulnerabilities within the OpenCMS installation and related modules. The implementation of CSP headers provides an additional layer of protection by restricting the sources from which scripts can be executed, effectively mitigating the impact of successful XSS attacks. Regular security audits and penetration testing should be conducted to ensure that input validation mechanisms remain effective against evolving attack techniques. Organizations should also implement user education programs to raise awareness about the risks of submitting untrusted content and establish proper content moderation procedures for user-generated data. The vulnerability highlights the importance of defense-in-depth strategies and proper security coding practices that prevent injection flaws at the source rather than relying solely on perimeter defenses.