CVE-2006-5402 in PHPmybibli
Summary
by MITRE
Multiple PHP remote file inclusion vulnerabilities in PHPmybibli 3.0.1 and earlier allow remote attackers to execute arbitrary PHP code via a URL in the (1) class_path, (2) javascript_path, and (3) include_path parameters in (a) cart.php; the (4) class_path parameter in (b) index.php; the (5) javascript_path parameter in (c) edit.php; the (6) include_path parameter in (d) circ.php; unspecified parameters in (e) select.php; and unspecified parameters in other files.
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Analysis
by VulDB Data Team • 04/25/2026
The vulnerability identified as CVE-2006-5402 represents a critical remote file inclusion flaw affecting PHPmybibli version 3.0.1 and earlier implementations. This vulnerability manifests across multiple entry points within the application's codebase, creating a widespread attack surface that enables malicious actors to execute arbitrary PHP code on vulnerable systems. The flaw stems from insufficient input validation and sanitization mechanisms that fail to properly restrict user-supplied data from being directly incorporated into file inclusion operations. The affected parameters include class_path, javascript_path, and include_path across several PHP scripts including cart.php, index.php, edit.php, and circ.php, demonstrating the pervasive nature of the vulnerability throughout the application's architecture.
The technical exploitation of this vulnerability occurs when remote attackers manipulate the specified parameters to inject malicious URLs that are subsequently processed by PHP's include or require functions. This allows attackers to load and execute arbitrary PHP code from remote servers, effectively bypassing local security controls and potentially gaining full administrative access to the affected system. The vulnerability directly maps to CWE-88, which describes improper neutralization of special elements used in an OS command, and CWE-94, which addresses the execution of arbitrary code due to improper input validation. The attack vector operates through the standard HTTP protocol, requiring no authentication or local access, making it particularly dangerous for web applications that are publicly accessible.
The operational impact of this vulnerability extends beyond simple code execution, potentially enabling complete system compromise and data breach scenarios. Attackers can leverage this flaw to establish persistent backdoors, exfiltrate sensitive bibliographic data, or use the compromised system as a launching point for further attacks within the network infrastructure. The vulnerability affects not just individual applications but also poses risks to the broader network security posture, particularly in environments where multiple web applications share common infrastructure or database resources. This type of vulnerability aligns with ATT&CK technique T1190, which covers the exploitation of remote services, and T1059, which involves the execution of code through command injection.
Mitigation strategies for this vulnerability require immediate implementation of input validation and sanitization measures across all user-supplied parameters. Organizations should implement strict whitelisting mechanisms that only permit known good paths and prevent dynamic inclusion of external resources. The recommended approach involves modifying the vulnerable scripts to reject any input containing URLs or external resource references, particularly for the identified parameters. Additionally, the application should be upgraded to a patched version that addresses the root cause of the vulnerability, as the original software versions are no longer supported and contain multiple other security flaws. Security administrators should also implement web application firewalls and monitor for suspicious inclusion patterns in server logs, as this vulnerability often manifests through crafted HTTP requests that can be detected through proper network monitoring and intrusion detection systems.