CVE-2011-5187 in Support
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the Support Ticketing System module 6.x-1.x before 6.x-1.7 for Drupal allows remote authenticated users with the "administer support projects" permission to inject arbitrary web script or HTML via unspecified vectors.
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Analysis
by VulDB Data Team • 02/22/2019
The CVE-2011-5187 vulnerability represents a critical cross-site scripting flaw within the Drupal Support Ticketing System module version 6.x-1.x prior to 6.x-1.7. This vulnerability specifically targets authenticated users who possess the "administer support projects" permission, creating a significant security risk for Drupal-based web applications that utilize this module. The flaw allows malicious actors with sufficient privileges to inject arbitrary web scripts or HTML content into the application's response, potentially compromising user sessions and data integrity.
The technical nature of this vulnerability stems from insufficient input validation and output encoding within the Support Ticketing System module. When authenticated administrators interact with the module's administrative interface, the application fails to properly sanitize user-supplied data before rendering it in web responses. This inadequate sanitization creates an XSS attack vector where malicious scripts can be executed in the context of other users' browsers. The vulnerability's classification as a persistent XSS issue means that the injected scripts can be stored on the server and executed whenever affected users access the compromised pages, making it particularly dangerous for environments where multiple administrators interact with the system.
The operational impact of CVE-2011-5187 extends beyond simple script injection, as it enables attackers to potentially escalate privileges and compromise the entire web application. An attacker with the "administer support projects" permission can manipulate the module's functionality to redirect users to malicious sites, steal session cookies, or execute arbitrary commands on behalf of authenticated users. This vulnerability directly violates the principle of least privilege and can lead to complete system compromise if the affected administrators have broader access rights within the Drupal installation. The attack vector operates through the module's administrative interface, making it particularly insidious as it leverages legitimate administrative functionality to deliver malicious payloads.
Security professionals should recognize this vulnerability as a classic example of CWE-79 - Improper Neutralization of Input During Web Page Generation, which is categorized under the OWASP Top Ten as a critical web application security risk. The ATT&CK framework would classify this vulnerability under T1059 - Command and Scripting Interpreter and T1566 - Phishing, as it enables attackers to execute malicious code through web-based attack vectors and potentially use the compromised system to launch further phishing campaigns. Organizations should immediately implement the patch released in version 6.x-1.7 of the Support Ticketing System module and conduct comprehensive security audits of their Drupal installations. Additional mitigations include implementing Content Security Policy headers, regular security scanning of web applications, and ensuring that administrative users have the minimum required permissions to reduce the potential impact of such vulnerabilities.