CVE-2006-5385 in SpamOborona
Summary
by MITRE
PHP remote file inclusion vulnerability in admin/admin_spam.php in the SpamOborona 1.0b and earlier phpBB module allows remote attackers to execute arbitrary PHP code via a URL in the phpbb_root_path parameter.
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Analysis
by VulDB Data Team • 04/24/2026
The CVE-2006-5385 vulnerability represents a critical remote file inclusion flaw affecting the SpamOborona phpBB module version 1.0b and earlier. This vulnerability exists within the administrative component of the module, specifically in the admin/admin_spam.php file, where improper input validation allows attackers to inject malicious URLs into the phpbb_root_path parameter. The flaw enables remote code execution through a carefully crafted malicious URL that gets processed by the vulnerable application, creating a pathway for attackers to execute arbitrary PHP code on the target server. This type of vulnerability falls under the category of insecure direct object references and improper input validation, which are fundamental security weaknesses that have persisted across numerous web applications.
The technical exploitation of this vulnerability requires an attacker to craft a malicious request that includes a URL in the phpbb_root_path parameter, which is then processed by the vulnerable script without proper sanitization or validation. When the application attempts to include the specified file path, it executes the remote code contained in the malicious URL, effectively allowing the attacker to gain unauthorized control over the server. This vulnerability is particularly dangerous because it operates at the application level and can be exploited from remote locations without requiring any local access or authentication. The flaw demonstrates a classic case of insufficient input validation where user-supplied data is directly incorporated into file inclusion operations, creating a direct pathway for remote code execution.
From an operational impact perspective, this vulnerability poses severe risks to organizations using affected phpBB installations with the SpamOborona module. Successful exploitation can result in complete server compromise, allowing attackers to execute commands, access sensitive data, install backdoors, or use the compromised server as a launch point for further attacks within the network. The vulnerability affects the integrity and confidentiality of the entire web application, potentially exposing user data, session information, and other sensitive system resources. Organizations running vulnerable versions of this module face significant exposure to persistent threats and may experience service disruption, data breaches, and compliance violations that could lead to regulatory penalties and financial losses.
The vulnerability aligns with several industry standards and frameworks, including CWE-98 which describes improper input validation leading to remote file inclusion, and CWE-20 which covers improper input validation in general. From an ATT&CK framework perspective, this vulnerability maps to T1059.007 for remote code execution and T1078 for valid accounts, as exploitation often requires legitimate access to the web application. The attack surface is particularly concerning because it can be exploited through simple HTTP requests, making it accessible to attackers with minimal technical expertise. Organizations should immediately implement patches or updates to address this vulnerability, as the module version 1.0b and earlier are no longer supported and contain multiple security flaws. Additional mitigations include implementing proper input validation, using whitelisting mechanisms for file inclusion operations, and deploying web application firewalls to detect and block malicious requests targeting this specific vulnerability pattern.