CVE-2009-1938 in Joomla
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Joomla! 1.5.x through 1.5.10 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors related to database output and the frontend administrative panel.
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Analysis
by VulDB Data Team • 06/14/2025
The CVE-2009-1938 vulnerability represents a critical cross-site scripting flaw discovered in Joomla! content management systems version 1.5.x through 1.5.10. This vulnerability resides in the database output handling mechanisms and specifically affects the frontend administrative panel components, creating a significant security risk for web applications utilizing this version of the CMS. The flaw enables remote attackers to execute malicious scripts within the context of a victim's browser, potentially compromising user sessions and data integrity.
The technical nature of this vulnerability stems from insufficient input validation and output sanitization within the Joomla! framework's database interaction layers. When user-supplied data is processed and displayed in the frontend administrative interface, the system fails to properly escape or filter special characters that could be interpreted as HTML or JavaScript code. This weakness falls under the CWE-79 category of Cross-Site Scripting, specifically representing a stored XSS variant where malicious payloads can persist in the database and execute whenever the affected content is rendered. The vulnerability's impact is amplified by its presence in the administrative panel, which typically handles sensitive user data and privileged operations.
Operationally, this vulnerability exposes Joomla! installations to several attack vectors that can result in severe consequences for both administrators and end users. Attackers can craft malicious input that gets stored in the database and subsequently executed when administrators view the affected pages, leading to session hijacking, credential theft, or unauthorized administrative actions. The remote nature of the attack means that exploitation does not require local access to the system, making it particularly dangerous for publicly accessible web applications. This vulnerability directly aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter, as attackers can inject malicious scripts that execute within the victim's browser context.
The exploitation of this vulnerability can result in comprehensive compromise of web applications running affected Joomla! versions. Administrators who view maliciously crafted content may inadvertently execute scripts that steal cookies, redirect to malicious sites, or perform unauthorized actions within the application. The persistence of stored XSS attacks means that the malicious code remains active until manually removed from the database, potentially affecting multiple users over extended periods. Organizations using vulnerable versions face risks of data breaches, service disruption, and potential regulatory compliance violations due to the exposure of sensitive user information and administrative privileges.
Mitigation strategies for CVE-2009-1938 should prioritize immediate patching of affected Joomla! installations to version 1.5.11 or later, which contains the necessary security fixes. Additionally, implementing proper input validation and output encoding mechanisms within custom extensions can help prevent similar vulnerabilities from emerging in third-party components. Security monitoring should include regular scanning for XSS vulnerabilities in web applications, with particular attention to database-driven content management systems. Organizations should also establish secure coding practices that align with OWASP Top Ten recommendations, including proper sanitization of user inputs and implementing Content Security Policy headers to limit the impact of potential XSS exploitation. Regular security assessments and vulnerability management processes are essential for maintaining protection against such persistent threats in content management systems.