CVE-2011-2509 in Joomla
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in Joomla! before 1.6.4 allow remote attackers to inject arbitrary web script or HTML via (1) the query string to the com_contact component, as demonstrated by the Itemid parameter to index.php; (2) the query string to the com_content component, as demonstrated by the filter_order parameter to index.php; (3) the query string to the com_newsfeeds component, as demonstrated by an arbitrary parameter to index.php; or (4) the option parameter in a reset.request action to index.php; and, when Internet Explorer or Konqueror is used, (5) allow remote attackers to inject arbitrary web script or HTML via the searchword parameter in a search action to index.php in the com_search component.
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Analysis
by VulDB Data Team • 01/12/2025
The vulnerability CVE-2011-2509 represents a critical cross-site scripting flaw affecting Joomla framework, creating a wide attack surface that attackers can exploit through various parameter injection points within the application's query string handling mechanisms.
The technical exploitation occurs through several distinct pathways that leverage the lack of proper input sanitization in different Joomla! components. The primary attack vectors include the Itemid parameter within the com_contact component, the filter_order parameter in com_content, arbitrary parameters in com_newsfeeds, and the option parameter during reset.request actions. Additionally, when targeting Internet Explorer or Konqueror browsers, attackers can leverage the searchword parameter in com_search component actions, exploiting browser-specific rendering behaviors that make the XSS payload execution more reliable. These vulnerabilities demonstrate how improper sanitization of user input in web applications creates persistent security weaknesses that can be chained together to deliver malicious payloads.
The operational impact of this vulnerability extends far beyond simple script injection, as it enables attackers to execute arbitrary code within the context of victim browsers, potentially leading to session hijacking, credential theft, or full account compromise. When combined with browser-specific behaviors in Internet Explorer and Konqueror, the attack surface expands significantly, as these browsers may handle certain HTML elements differently, making the exploitation more reliable and potentially more dangerous. The vulnerability affects not only the end users but also administrators who may inadvertently execute malicious scripts while browsing the site, creating a potential escalation path for attackers seeking to gain elevated privileges within the Joomla! environment.
Organizations using affected Joomla development team as part of version 1.6.4, which address the input validation issues across all affected components. The mitigation strategy should also include implementing comprehensive input validation at multiple layers, including web application firewalls that can detect and block suspicious query parameters, and regular security audits to identify similar vulnerabilities in other components. Additionally, organizations should consider implementing content security policies and input sanitization libraries that can prevent the execution of malicious scripts regardless of the specific attack vector used, aligning with the defensive measures recommended in the ATT&CK framework for web application security. The vulnerability serves as a reminder of the critical importance of proper input validation and the need for continuous security monitoring in web applications.