CVE-2011-5186 in jbShop plugin
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in jbshop.php in the jbShop plugin for e107 7 allows remote attackers to inject arbitrary web script or HTML via the item_id parameter.
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Analysis
by VulDB Data Team • 12/21/2024
The CVE-2011-5186 vulnerability represents a classic cross-site scripting flaw within the jbShop plugin for the e107 content management system version 7. This vulnerability specifically affects the jbshop.php script and arises from insufficient input validation of the item_id parameter. The flaw allows remote attackers to inject malicious web scripts or HTML code into the application's response, creating a persistent security risk for users interacting with the vulnerable system. The vulnerability stems from the plugin's failure to properly sanitize or escape user-supplied input before incorporating it into dynamically generated web content, which directly violates fundamental web application security principles.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious URL containing crafted script code within the item_id parameter value. When the vulnerable e107 system processes this request and renders the jbshop.php page, the malicious code gets executed within the browser context of authenticated users who view the affected content. This type of vulnerability falls under CWE-79 which specifically addresses Cross-Site Scripting vulnerabilities in software applications. The attack vector is particularly dangerous because it can be executed without requiring any special privileges or authentication, making it accessible to any remote attacker with knowledge of the vulnerable application's URL structure.
The operational impact of CVE-2011-5186 extends beyond simple script injection, as it can enable sophisticated attack chains that compromise user sessions, steal sensitive data, or redirect users to malicious websites. Attackers can leverage this vulnerability to perform session hijacking by injecting scripts that capture user authentication tokens, or they can use the vulnerability to deliver malware through drive-by download attacks. The vulnerability also aligns with ATT&CK technique T1566 which covers social engineering attacks through malicious content delivery, and T1059 which involves command and control through script-based attacks. The persistent nature of XSS vulnerabilities means that once exploited, malicious scripts can remain active until the affected application is patched or the user clears their browser cache.
Mitigation strategies for this vulnerability require immediate patching of the e107 CMS and the jbShop plugin to ensure proper input sanitization and output encoding of user-supplied parameters. Organizations should implement comprehensive input validation mechanisms that filter or escape special characters in the item_id parameter, particularly those commonly used in script injection attacks such as angle brackets, quotes, and script tags. The remediation process should also include implementing Content Security Policy headers to prevent execution of unauthorized scripts, and conducting thorough security reviews of all plugin components to identify similar vulnerabilities. Additionally, regular security assessments and vulnerability scanning should be implemented to detect similar issues in other application components, as this vulnerability demonstrates the importance of proper input validation across all user-facing parameters in web applications.