CVE-2006-5904 in MWChat Pro
Summary
by MITRE
Multiple PHP remote file inclusion vulnerabilities in MWChat Pro 7.0 allow remote attackers to execute arbitrary PHP code via a URL in the CONFIG[MWCHAT_Libs] parameter to (1) about.php, (2) buddy.php, (3) chat.php, (4) dialog.php, (5) head.php, (6) help.php, (7) index.php, and (8) license.php, different vectors than CVE-2005-1869.
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Analysis
by VulDB Data Team • 04/27/2026
The CVE-2006-5904 vulnerability represents a critical remote file inclusion flaw in MWChat Pro 7.0 that exposes multiple entry points for attackers to execute arbitrary PHP code on affected systems. This vulnerability operates through the CONFIG[MWCHAT_Libs] parameter which is processed in eight distinct PHP files including about.php, buddy.php, chat.php, dialog.php, head.php, help.php, index.php, and license.php. The flaw stems from inadequate input validation and sanitization mechanisms that fail to properly verify or escape user-supplied URLs before incorporating them into the application's execution flow. This allows malicious actors to inject external URLs that point to attacker-controlled PHP scripts, effectively bypassing the application's intended security boundaries.
The technical exploitation of this vulnerability aligns with CWE-88, which describes improper neutralization of special elements used in an expression, and specifically manifests as a remote code execution vector through insecure input handling. Attackers can leverage this weakness by crafting malicious URLs that contain PHP code or references to malicious scripts hosted on remote servers. When the application processes these parameters, it includes and executes the attacker-controlled content, providing full control over the affected system. The vulnerability's impact extends beyond simple code execution to include complete system compromise, data theft, and potential lateral movement within network environments where the vulnerable application resides.
The operational implications of CVE-2006-5904 are severe and multifaceted, as it provides attackers with persistent access to compromised systems through the inclusion of remote PHP files. This vulnerability operates at the application layer and can be exploited through various attack vectors including web browser interactions, automated scanning tools, or manual exploitation techniques. The affected MWChat Pro 7.0 application becomes a potential pivot point for attackers to conduct further reconnaissance, establish backdoors, or deploy additional malware. From an ATT&CK framework perspective, this vulnerability maps to T1190 - Exploit Public-Facing Application and T1059.007 - Command and Scripting Interpreter: PHP, demonstrating how attackers can leverage web application weaknesses to achieve their objectives.
Mitigation strategies for CVE-2006-5904 should focus on immediate patching of the vulnerable MWChat Pro 7.0 application to address the root cause of the insecure parameter handling. Organizations must implement strict input validation mechanisms that prevent the inclusion of external URLs in configuration parameters, utilizing allowlists or proper URL sanitization techniques. Security measures should include disabling remote file inclusion features in PHP configurations, implementing proper parameter validation, and employing web application firewalls to detect and block malicious requests. Additionally, regular security assessments and vulnerability scanning should be conducted to identify similar weaknesses in other applications, as this vulnerability demonstrates the importance of proper input handling and the potential for remote code execution through seemingly innocuous configuration parameters. The remediation process must also include monitoring for exploitation attempts and implementing network segmentation to limit the potential impact of successful attacks.