CVE-2013-7430 in Joomla
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Joomla 2.x and 3.x allows remote attackers to inject arbitrary web script or HTML via the xmlns parameter.
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Analysis
by VulDB Data Team • 05/31/2020
The CVE-2013-7430 vulnerability represents a critical cross-site scripting flaw discovered in Joomla content management systems affecting versions 2.x and 3.x. This vulnerability specifically targets the xmlns parameter handling within the Joomla framework, creating a pathway for remote attackers to execute malicious scripts in the context of affected user sessions. The flaw stems from insufficient input validation and sanitization mechanisms that fail to properly process or escape user-supplied data before rendering it within web pages. This particular vulnerability aligns with CWE-79 which categorizes cross-site scripting as a weakness where applications fail to properly validate or escape user-controllable data that gets rendered in web pages. The vulnerability operates at the application layer and can be classified under the ATT&CK technique T1059.001 for command and scripting interpreter, specifically targeting web application interfaces.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious payload containing script code within the xmlns parameter of a Joomla application request. When the vulnerable Joomla system processes this parameter without proper sanitization, the injected script gets executed in the browser context of any user who views the affected page or interacts with the malicious content. This allows attackers to perform various malicious activities including session hijacking, credential theft, defacement of web content, or redirection to malicious sites. The vulnerability is particularly dangerous because it can be exploited through multiple vectors including forms, URL parameters, and even through XML-based data feeds that Joomla processes. Attackers can leverage this flaw to establish persistent access to user sessions, potentially compromising entire user accounts and enabling further lateral movement within compromised systems.
The operational impact of CVE-2013-7430 extends beyond simple script injection, as it provides attackers with significant control over affected web applications and their users. Successful exploitation can result in complete compromise of user sessions, leading to unauthorized access to sensitive data, modification of content, and potential use as a foothold for broader network attacks. Organizations running vulnerable Joomla installations face increased risk of data breaches, reputational damage, and regulatory compliance violations. The vulnerability affects not only the web application itself but also the broader ecosystem of users and administrators who may be tricked into executing malicious scripts. This type of vulnerability is particularly concerning in enterprise environments where Joomla might be used for internal portals, customer-facing websites, or administrative interfaces. The exploitation can occur without user interaction in some cases, making it especially dangerous for widespread impact.
Mitigation strategies for CVE-2013-7430 require immediate action including the application of official security patches released by Joomla developers, which typically involve implementing proper input validation and output escaping mechanisms for the xmlns parameter. Organizations should also implement comprehensive web application firewalls that can detect and block malicious payloads targeting XSS vulnerabilities. Regular security assessments and input validation testing should be conducted to identify similar vulnerabilities in custom extensions or third-party components that may be running on the Joomla platform. Network segmentation and least privilege access controls can help limit the impact if exploitation occurs. Additionally, implementing content security policies and regular security monitoring can provide early detection of potential exploitation attempts. Security teams should also consider implementing automated vulnerability scanning tools that can identify and alert on known XSS patterns in web applications. The remediation process must include thorough testing of patches to ensure they do not introduce regressions in application functionality while maintaining the security benefits of proper input sanitization.