CVE-2005-4573 in Plogger
Summary
by MITRE
PHP remote file include vulnerability in plog-admin-functions.php in Plogger Beta 2 allows remote attackers to execute arbitrary code via a URL in the config[basedir] parameter.
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Analysis
by VulDB Data Team • 10/27/2025
The vulnerability described in CVE-2005-4573 represents a critical remote code execution flaw within the Plogger Beta 2 web application, specifically affecting the plog-admin-functions.php file. This issue falls under the category of insecure direct object references and remote file inclusion attacks, which have been consistently identified as high-risk vulnerabilities in web applications. The vulnerability stems from insufficient input validation and sanitization mechanisms that fail to properly restrict user-supplied data from being processed as part of file inclusion operations. The affected parameter config[basedir] demonstrates a classic pattern where application configuration values are directly incorporated into file path operations without adequate security controls.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious URL and injects it into the config[basedir] parameter, which is then processed by the vulnerable plog-admin-functions.php script. This allows the attacker to specify arbitrary file paths that can be included and executed on the target server. The vulnerability is particularly dangerous because it enables attackers to execute arbitrary PHP code on the web server, potentially leading to complete system compromise. The flaw operates at the application level and demonstrates poor input validation practices that violate fundamental security principles outlined in the OWASP Top Ten and CWE-94, which specifically addresses "Improper Control of Generation of Code ('Code Injection')".
From an operational impact perspective, this vulnerability creates a severe risk landscape for organizations using Plogger Beta 2, as it provides attackers with the capability to execute malicious code remotely without requiring authentication. The attack surface is particularly concerning given that the vulnerability exists in administrative functions, potentially allowing attackers to gain elevated privileges and full control over the web application. The implications extend beyond simple code execution to include potential data exfiltration, system persistence mechanisms, and further lateral movement within network environments. This vulnerability aligns with ATT&CK technique T1190 "Exploit Public-Facing Application" and represents a common vector for initial access in security breach scenarios.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term architectural improvements. The most effective immediate solution involves patching the application to implement proper input validation and sanitization of the config[basedir] parameter, ensuring that only trusted and validated paths are accepted. Organizations should implement strict parameter validation that rejects any input containing URL schemes or external references. Additionally, the application should be configured to use absolute paths only and disable remote file inclusion features entirely. Security measures should include input filtering, output encoding, and the implementation of a whitelist-based approach for file operations. The vulnerability also highlights the importance of following secure coding practices, including the principle of least privilege and defense in depth strategies. Organizations should conduct regular security assessments and code reviews to identify similar patterns that could lead to remote code execution vulnerabilities. The remediation process should also include implementing proper access controls and monitoring mechanisms to detect and prevent unauthorized modifications to application configuration parameters. This vulnerability serves as a prime example of why organizations must maintain up-to-date security practices and why legacy applications require careful security evaluation before deployment in production environments.