CVE-2006-5193 in WikyBlog
Summary
by MITRE
PHP remote file inclusion vulnerability in index.php in Josh Schmidt WikyBlog 1.2.3 and earlier allows remote attackers to execute arbitrary PHP code via a URL in the includeDir parameter.
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Analysis
by VulDB Data Team • 04/23/2026
The vulnerability identified as CVE-2006-5193 represents a critical remote file inclusion flaw in the Josh Schmidt WikyBlog 1.2.3 content management system, classified under the CWE-88 weakness category for Improper Neutralization of Argument Delimiters in a Command. This vulnerability exists within the index.php script where user-controllable input is directly incorporated into file inclusion operations without adequate sanitization or validation. The specific parameter affected is includeDir, which accepts URL values that are subsequently processed through PHP's include or require functions, creating an avenue for remote code execution.
The technical exploitation of this vulnerability relies on the improper handling of user-supplied data within a dynamic file inclusion context, making it susceptible to attacks that leverage the PHP include functionality to execute malicious code. Attackers can craft specially formatted URLs containing malicious PHP payloads within the includeDir parameter, which when processed by the vulnerable application, results in the execution of arbitrary code on the target server. This type of vulnerability falls under the ATT&CK technique T1190 for Exploit Public-Facing Application, as it targets web applications accessible from external networks. The flaw demonstrates a classic path traversal and code injection pattern where attacker-controlled input bypasses normal access controls and validation mechanisms.
The operational impact of this vulnerability is severe as it provides attackers with complete control over the affected server, enabling them to execute commands, access sensitive data, and potentially establish persistent backdoors. Remote attackers can leverage this vulnerability to compromise the entire web application infrastructure, leading to data breaches, service disruption, and potential lateral movement within the network. The vulnerability affects all versions of WikyBlog up to and including version 1.2.3, indicating a widespread exposure across multiple installations. Organizations running affected versions face significant risk of unauthorized access, data exfiltration, and system compromise, with the potential for cascading effects throughout the enterprise network.
Mitigation strategies for this vulnerability involve immediate patching of the affected software to the latest available version that addresses the remote file inclusion flaw. System administrators should implement input validation and sanitization measures to prevent malicious URLs from being processed through the includeDir parameter, utilizing strict whitelisting approaches for all user-controllable inputs. Network-level defenses such as web application firewalls and intrusion prevention systems can provide additional layers of protection by monitoring for suspicious URL patterns and blocking known malicious payloads. The implementation of secure coding practices including parameterized queries and proper input validation should be enforced throughout the application development lifecycle to prevent similar vulnerabilities from emerging in future releases. Organizations should also conduct comprehensive security assessments of their web applications to identify and remediate other potential remote code execution vulnerabilities, following the principle of least privilege and implementing proper access controls to minimize the impact of successful exploitation attempts.