CVE-2012-6659 in Phorum
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the admin interface in Phorum before 5.2.19 allows remote attackers to inject arbitrary web script or HTML via a crafted URL.
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Analysis
by VulDB Data Team • 03/12/2019
The CVE-2012-6659 vulnerability represents a critical cross-site scripting flaw discovered in the Phorum bulletin board system's administrative interface prior to version 5.2.19. This vulnerability resides within the web application's input validation mechanisms and specifically targets the admin panel where authorized users manage forum content and configurations. The flaw allows remote attackers to execute malicious scripts in the context of authenticated admin sessions, potentially enabling complete compromise of the forum's administrative capabilities and underlying data integrity.
The technical implementation of this vulnerability stems from inadequate sanitization of user-supplied input within the administrative URL handling mechanisms. When administrators navigate to specially crafted URLs containing malicious script payloads, the application fails to properly escape or validate these inputs before rendering them in the admin interface. This failure creates an environment where attacker-controlled JavaScript code can execute within the privileged context of admin users, bypassing standard security controls that protect against unauthorized access. The vulnerability is classified under CWE-79 as a failure to sanitize user input, specifically manifesting as a reflected cross-site scripting condition that occurs when the application processes and displays unvalidated input directly in its output.
The operational impact of this vulnerability extends beyond simple data theft or defacement, as it provides attackers with elevated privileges within the forum environment. An attacker who successfully exploits this vulnerability can manipulate forum configurations, delete or modify user accounts, post malicious content, and potentially escalate the attack to compromise the entire web server hosting the forum. The administrative access gained through this vector can be leveraged to establish persistent backdoors, modify security settings, or exfiltrate sensitive information including user credentials and private communications. This vulnerability directly aligns with ATT&CK technique T1059.007 for command and scripting interpreter, where attackers can execute malicious code through web interfaces that lack proper input validation controls.
Mitigation strategies for CVE-2012-6659 require immediate patching of the affected Phorum installations to version 5.2.19 or later, which includes proper input validation and output encoding mechanisms. Organizations should implement comprehensive input sanitization at multiple layers, including URL parameter validation, HTML escaping for all dynamic content, and the adoption of Content Security Policy headers to limit script execution. Network-based defenses such as web application firewalls should be configured to monitor for suspicious URL patterns and malformed input sequences. Additionally, administrative access should be restricted through multi-factor authentication, network segmentation, and regular security audits to minimize the potential impact of such vulnerabilities. The remediation process must also include comprehensive user education regarding the dangers of clicking untrusted links and the importance of maintaining updated software versions.