CVE-2006-5092 in A-Blog
Summary
by MITRE
PHP remote file inclusion vulnerability in navigation/menu.php in A-Blog 2 allows remote attackers to execute arbitrary PHP code via a URL in the navigation_start parameter.
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Analysis
by VulDB Data Team • 04/23/2026
The vulnerability described in CVE-2006-5092 represents a critical remote file inclusion flaw affecting A-Blog 2 software. This issue resides within the navigation/menu.php script where the application fails to properly validate user input before incorporating it into file inclusion operations. The vulnerability specifically manifests when the navigation_start parameter is manipulated by an attacker, allowing for the execution of arbitrary PHP code on the target system. Such flaws typically arise from insecure programming practices where user-supplied data is directly used in dynamic file operations without adequate sanitization or validation mechanisms.
The technical exploitation of this vulnerability occurs through manipulation of the navigation_start parameter which is then processed by the vulnerable script. When an attacker crafts a malicious URL and passes it through this parameter, the application's insecure file inclusion mechanism executes the remote code as if it were part of the legitimate application flow. This behavior aligns with CWE-88, which describes improper neutralization of special elements used in an expression, specifically in the context of file inclusion operations. The vulnerability essentially allows attackers to inject and execute code from remote locations, providing them with unauthorized access to the affected system's resources and potentially full control over the server environment.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with persistent access to the compromised system. Once exploited, malicious actors can establish backdoors, escalate privileges, and perform further reconnaissance activities within the network. The vulnerability affects the availability, integrity, and confidentiality of the web application and underlying server infrastructure. From an ATT&CK framework perspective, this vulnerability maps to techniques involving remote code execution and privilege escalation, enabling attackers to move laterally within the network and maintain persistent access. The flaw particularly impacts web application security by undermining the trust boundary between user input and system execution, allowing untrusted data to influence program behavior in dangerous ways.
Mitigation strategies for CVE-2006-5092 must focus on implementing proper input validation and sanitization mechanisms. Organizations should immediately patch the affected A-Blog 2 installation with the latest security updates provided by the vendor. Additionally, implementing proper parameter validation in the navigation/menu.php script would prevent malicious URLs from being processed as valid file paths. Security measures should include disabling remote file inclusion features, implementing whitelist validation for all input parameters, and using secure coding practices that prevent dynamic file operations with untrusted data. Network-level protections such as web application firewalls and intrusion detection systems can provide additional layers of defense against exploitation attempts. Regular security assessments and code reviews should be conducted to identify and remediate similar vulnerabilities in other applications within the organization's infrastructure, ensuring compliance with security standards and reducing the overall attack surface.