CVE-2006-5283 in Minichat
Summary
by MITRE
PHP remote file inclusion vulnerability in ftag.php in Minichat 6.0 allows remote attackers to execute arbitrary PHP code via a URL in the mostrar parameter.
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Analysis
by VulDB Data Team • 04/24/2026
The vulnerability described in CVE-2006-5283 represents a critical remote file inclusion flaw affecting Minichat 6.0 software. This vulnerability exists within the ftag.php script where the mostrar parameter is processed without proper input validation, creating an avenue for malicious actors to inject and execute arbitrary PHP code on the target system. The flaw demonstrates a classic security oversight in web application development where user-controllable input directly influences file inclusion operations, enabling attackers to leverage this weakness for remote code execution.
This vulnerability falls under the category of CWE-98, which specifically addresses "Improper Control of Generation of Code ('Code Injection')" and aligns with ATT&CK technique T1190 - "Exploit Public-Facing Application" as it targets a publicly accessible web application component. The issue stems from improper sanitization of the mostrar parameter, which allows attackers to supply URLs that point to malicious PHP scripts hosted on remote servers. When the application processes this parameter, it includes the specified file without adequate validation, thereby executing the attacker's malicious code within the context of the web server.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with the ability to fully compromise the affected system. Successful exploitation enables attackers to gain persistent access to the web server, potentially leading to data breaches, system infiltration, and further network compromise. The vulnerability's remote nature means that attackers can exploit it from anywhere on the internet without requiring local system access, making it particularly dangerous for publicly accessible web applications. Organizations running vulnerable versions of Minichat 6.0 face significant risk of unauthorized access and potential complete system compromise.
Mitigation strategies for this vulnerability should focus on implementing strict input validation and sanitization practices. The most effective immediate fix involves removing the vulnerable file inclusion mechanism entirely by avoiding dynamic include statements that rely on user input. Security measures should include parameter validation to ensure that only expected values are accepted, implementing whitelisting approaches for file inclusion parameters, and applying proper input sanitization techniques. Additionally, organizations should consider implementing web application firewalls and security monitoring to detect and prevent exploitation attempts. The remediation process requires updating the affected software to a patched version or implementing proper code validation that prevents the mostrar parameter from accepting external URLs, thereby eliminating the attack vector entirely.