CVE-2006-5016 in e-Vision CMS
Summary
by MITRE
Unrestricted file upload vulnerability in admin/x_image.php in Szava Gyula and Csaba Tamas e-Vision CMS, probably 1.0, allows remote attackers to upload arbitrary files to the /imagebank directory.
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Analysis
by VulDB Data Team • 10/10/2025
The CVE-2006-5016 vulnerability represents a critical security flaw in the e-Vision CMS developed by Szava Gyula and Csaba Tamas, specifically affecting version 1.0 and potentially later iterations. This vulnerability resides within the administrative component of the content management system, specifically in the admin/x_image.php file, which handles image upload functionality. The flaw manifests as an unrestricted file upload capability that permits remote attackers to bypass normal file validation mechanisms and deposit malicious files directly into the web server's imagebank directory. This directory serves as the designated storage location for uploaded images, making it a prime target for exploitation.
The technical nature of this vulnerability aligns with CWE-434, which describes the improper restriction of uploads of executable files. The flaw stems from insufficient input validation and sanitization within the file upload process, allowing attackers to submit files with potentially dangerous extensions or content without proper authorization checks. The vulnerability exists because the application fails to implement adequate file type verification, file content inspection, or directory access controls that would normally prevent the upload of non-image files or files containing malicious code. Attackers can exploit this by crafting specially formatted requests that bypass the intended file validation processes, potentially uploading web shells, script files, or other malicious payloads that can be executed within the web server context.
The operational impact of CVE-2006-5016 is severe and multifaceted, representing a significant threat to the security posture of affected systems. Once exploited, attackers gain the ability to execute arbitrary code on the web server, potentially leading to complete system compromise, data exfiltration, or the establishment of persistent backdoors. The vulnerability enables attackers to upload malicious files that can be accessed through the web server, creating opportunities for further attacks including privilege escalation, lateral movement within network environments, and establishment of command and control channels. The remote nature of the attack means that exploitation can occur from anywhere on the internet without requiring physical access to the target system, making it particularly dangerous for web applications that are publicly accessible.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term security improvements. The primary fix involves implementing strict file validation mechanisms that verify file extensions, content types, and file signatures before allowing uploads to proceed. This includes maintaining allowlists of permitted file types, implementing proper file content inspection, and ensuring that uploaded files are stored in directories that are not directly accessible via web requests. Organizations should also implement proper access controls and authentication mechanisms within the administrative interfaces, ensuring that only authorized personnel can access upload functionality. The remediation process should include thorough code review and security testing of all file upload components, along with regular security assessments to identify similar vulnerabilities. This vulnerability demonstrates the importance of following secure coding practices and adheres to ATT&CK technique T1190, which involves exploiting vulnerabilities in web applications to gain initial access and establish persistence within target environments.