CVE-2006-5222 in Dimension of phpBB
Summary
by MITRE
Multiple PHP remote file inclusion vulnerabilities in Dimension of phpBB 0.2.6 and earlier allow remote attackers to execute arbitrary PHP code via a URL in the phpbb_root_path parameter in (1) includes/themen_portal_mitte.php or (2) includes/logger_engine.php.
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Analysis
by VulDB Data Team • 04/24/2026
The vulnerability described in CVE-2006-5222 represents a critical remote file inclusion flaw affecting the Dimension of phpBB modification version 0.2.6 and earlier. This vulnerability exists within the phpBB forum software ecosystem and specifically targets the configuration handling mechanisms that govern how the application processes user-supplied input. The flaw stems from insufficient validation of the phpbb_root_path parameter, which is utilized by the affected scripts to determine the root directory path for phpBB components. When attackers manipulate this parameter with malicious URLs, they can effectively inject and execute arbitrary PHP code on the target server. The vulnerability impacts two specific files within the phpBB extension: includes/themen_portal_mitte.php and includes/logger_engine.php, both of which are susceptible to manipulation through the vulnerable parameter. This type of vulnerability falls under the category of CWE-88, which describes improper neutralization of special elements used in an OS command, and more specifically aligns with CWE-94, which covers execution of arbitrary code. The attack vector operates through the standard HTTP protocol where an attacker crafts a malicious URL containing PHP code within the phpbb_root_path parameter and submits it to the vulnerable phpBB installation. The operational impact of this vulnerability is severe as it allows attackers to achieve complete system compromise, enabling them to execute commands, access sensitive data, modify content, and potentially establish persistent backdoors. The vulnerability demonstrates a classic path traversal and code injection pattern that has been widely exploited in web application attacks and aligns with techniques documented in the MITRE ATT&CK framework under the T1190 category for exploitation of remote services. The attack requires minimal privileges and can be executed from any remote location, making it particularly dangerous for publicly accessible web servers. This vulnerability also exposes the broader security concerns of PHP applications that fail to properly sanitize user input before using it in file inclusion operations, highlighting the importance of input validation and proper parameter handling in web development practices. The specific nature of this vulnerability suggests that the phpBB extension developers failed to implement proper input sanitization or validation mechanisms, leaving the application open to exploitation through parameter manipulation. The affected versions of Dimension of phpBB represent a critical security gap that could allow attackers to gain unauthorized access to the underlying server infrastructure, potentially leading to complete system takeover and data breaches. Organizations running vulnerable versions of this phpBB extension should immediately implement mitigations including input validation, parameter sanitization, and application hardening measures to prevent exploitation attempts. The vulnerability also underscores the importance of regular security updates and patch management processes, as this flaw would have been addressed in later versions of the software through proper input validation and secure coding practices. This type of vulnerability has been documented in numerous security advisories and represents a common pattern in web application security that continues to be exploited in modern attack campaigns, making it essential for security professionals to understand the underlying mechanisms and implement appropriate defensive measures.