CVE-2012-4234 in Phorum
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the group moderation screen in the control center (control.php) in Phorum before 5.2.19 allows remote attackers to inject arbitrary web script or HTML via the group parameter.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 02/16/2025
The vulnerability identified as CVE-2012-4234 represents a critical cross-site scripting weakness in Phorum versions prior to 5.2.19, specifically affecting the group moderation functionality within the control center interface. This flaw exists in the control.php file where user input containing the group parameter is not properly sanitized or validated before being rendered back to users. The vulnerability arises from insufficient input validation mechanisms that fail to neutralize malicious script code embedded within the group parameter, creating an avenue for remote attackers to execute arbitrary web scripts or HTML content within the context of other users' browsers.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious payload containing script code and submits it through the group parameter in the control center's group moderation screen. When the vulnerable system processes this input and displays it without proper sanitization, the embedded scripts execute in the browser context of authenticated users who view the affected page. This type of vulnerability falls under CWE-79, which specifically addresses Cross-Site Scripting flaws in web applications, and aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter. The vulnerability demonstrates a classic input validation failure where the application trusts user-provided data without adequate sanitization, allowing attackers to inject malicious content that persists and executes in the victim's browser environment.
The operational impact of CVE-2012-4234 extends beyond simple script injection, as it can enable attackers to perform various malicious activities including session hijacking, credential theft, redirection to malicious sites, and data exfiltration. When authenticated users with administrative privileges access the compromised group moderation screen, attackers can potentially escalate their privileges or gain unauthorized access to sensitive system functions. The vulnerability affects the integrity and confidentiality of the web application by allowing unauthorized code execution, potentially compromising the entire user session and enabling persistent access to the system. This weakness particularly impacts organizations using Phorum forums, where administrators might be targeted due to their elevated privileges and the sensitive nature of control center functionalities.
Mitigation strategies for CVE-2012-4234 should focus on implementing robust input validation and output encoding mechanisms to prevent malicious script injection. Organizations should immediately upgrade to Phorum version 5.2.19 or later, which contains the necessary patches addressing this vulnerability. Additionally, implementing proper HTML escaping and sanitization of all user-provided input, particularly in administrative interfaces, is crucial. Security measures should include input validation that rejects or removes potentially malicious content such as script tags, event handlers, and other dangerous HTML constructs. The implementation of Content Security Policy (CSP) headers can provide an additional layer of protection by restricting script execution and preventing unauthorized code injection. Regular security assessments and code reviews should be conducted to identify similar vulnerabilities in other parts of the application, ensuring comprehensive protection against cross-site scripting attacks and maintaining the overall security posture of web applications.