CVE-2018-7465 in VirtueMart
Summary
by MITRE
An XSS issue was discovered in VirtueMart before 3.2.14. All the textareas in the backend of the plugin can be closed by simply adding </textarea> to the value and saving the product/config. By editing back the product/config, the editor's browser will execute everything after the </textarea>, leading to a possible XSS.
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Analysis
by VulDB Data Team • 06/21/2024
The vulnerability identified as CVE-2018-7465 represents a critical cross-site scripting flaw within the VirtueMart e-commerce plugin for Joomla, affecting versions prior to 3.2.14. This vulnerability resides in the backend text area handling mechanism where the application fails to properly sanitize user input before rendering it within HTML contexts. The flaw specifically impacts the product and configuration management interfaces where administrators can input data into text areas that are subsequently displayed without adequate output encoding or filtering.
The technical exploitation of this vulnerability occurs through a simple yet effective technique involving the injection of the closing HTML tag </textarea> into text input fields. When administrators save product or configuration data containing this malicious payload, the injected tag prematurely closes the textarea element in the HTML structure. This manipulation creates a condition where any subsequent HTML content following the injected closing tag becomes part of the rendered page, allowing attackers to inject arbitrary HTML, JavaScript, or other malicious code that executes within the browser context of authenticated users. The vulnerability is particularly dangerous because it leverages the trust relationship between the administrator and the application, enabling attackers to execute code in the context of the victim's session.
The operational impact of this vulnerability extends beyond simple data corruption or display issues, as it provides attackers with a potential pathway for privilege escalation and persistent access to the administrative interface. When administrators view or edit product configurations, the malicious code executes automatically, potentially leading to session hijacking, credential theft, or complete system compromise. The vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws in web applications, and can be mapped to ATT&CK technique T1059.007 for script injection attacks. The attack vector requires minimal sophistication as it exploits a fundamental input validation weakness, making it particularly dangerous for environments where administrators frequently input product data or configuration settings.
Mitigation strategies for this vulnerability require immediate patching to version 3.2.14 or later, which implements proper input sanitization and output encoding mechanisms. Organizations should also implement additional security controls including input validation at multiple layers, output encoding for all dynamic content, and regular security audits of web applications. The vulnerability demonstrates the importance of proper HTML context awareness in web development practices, particularly when handling user-supplied content that may be rendered within HTML structures. Security monitoring should include detection of unusual administrative activities and input patterns that may indicate attempted exploitation of similar injection vulnerabilities. Regular security assessments and adherence to secure coding practices, particularly around HTML and script context handling, are essential to prevent similar vulnerabilities from emerging in other components of the application stack.