CVE-2009-4651 in Com Webeecomment
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in the Webee Comments (com_webeecomment) component 1.1.1, 1.2, and 2.0 for Joomla! allow remote attackers to inject arbitrary web script or HTML via the (1) color, (2) img, or (3) url BBCode tags in unspecified vectors.
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Analysis
by VulDB Data Team • 05/01/2026
The CVE-2009-4651 vulnerability represents a significant cross-site scripting flaw within the Webee Comments component for Joomla! versions 1.1.1, 1.2, and 2.0. This vulnerability stems from inadequate input validation and sanitization mechanisms within the component's handling of BBCode tags, specifically color, img, and url parameters. The flaw exists at the application level where user-supplied data is not properly escaped or filtered before being rendered back to other users within the web interface. This type of vulnerability falls under CWE-79, which specifically addresses Cross-Site Scripting vulnerabilities in software applications.
The technical exploitation of this vulnerability occurs when remote attackers craft malicious BBCode tags containing embedded JavaScript or HTML content within the affected parameters. When other users view the comments containing these malicious payloads, the injected scripts execute in their browsers within the context of the vulnerable Joomla! site. This allows attackers to potentially steal session cookies, redirect users to malicious sites, perform actions on behalf of victims, or extract sensitive information from the targeted web application. The vulnerability is particularly dangerous because it leverages the legitimate BBCode functionality of the comments system, making it difficult to distinguish between benign and malicious content at runtime.
The operational impact of CVE-2009-4651 extends beyond simple script execution, as it can be leveraged for more sophisticated attacks within the context of the compromised Joomla! installation. Attackers can use this vulnerability to establish persistent access through session hijacking, create backdoor accounts, or manipulate the comments system to spread further malicious content. The vulnerability affects the integrity and availability of the web application's user interaction features, potentially leading to complete compromise of user sessions and data theft. From an attacker's perspective, this vulnerability maps to several ATT&CK techniques including T1566 for initial access through web application attacks and T1059 for command and control through script injection.
Mitigation strategies for CVE-2009-4651 should focus on immediate patching of the vulnerable component to the latest secure version, as well as implementing comprehensive input validation and output encoding mechanisms. Organizations should deploy web application firewalls to detect and block malicious BBCode patterns, implement strict content security policies, and conduct regular security audits of third-party Joomla! components. The vulnerability highlights the critical importance of proper sanitization of user input and demonstrates the necessity of following secure coding practices such as those outlined in the OWASP Top Ten and the CERT Secure Coding Standards. Additionally, administrators should consider implementing automated monitoring for suspicious comment patterns and establish incident response procedures specifically addressing cross-site scripting vulnerabilities in content management systems.