A critical arbitrary file upload vulnerability in the Microweber Administration panel allows authenticated attackers to achieve remote code execution and full system compromise.

The application fails to properly validate file types during upload processes within the administration panel. This flaw allows an authenticated user with administrative privileges to upload and execute arbitrary files, leading to remote code execution.

The ability to execute arbitrary code on the server constitutes a total compromise of the affected system. Successful exploitation allows an attacker to gain full control over the application environment, potentially leading to data theft, unauthorized modification of content, or the pivot point for lateral movement within the network. Given the CVSS score of 8.4, this vulnerability represents a high-severity risk to business operations and data integrity.

Immediate Action: Since no official vendor patch is currently available, restrict access to the administrative panel to trusted internal networks only. Audit all recently uploaded files in the media or upload directories for suspicious content.

Proactive Monitoring: Review server access logs for unusual file upload activity or requests originating from the administrative endpoint. Monitor for unexpected processes spawned by the web server user.

Compensating Controls: Implement a Web Application Firewall (WAF) rule to block file upload requests containing suspicious extensions or content signatures. Ensure that the web server user has restricted permissions to prevent the execution of uploaded scripts.

Public Exploit Available: No (exploit_available: false)

Organizations utilizing Microweber 2.0.19 should prioritize the implementation of strict access controls for the administration panel immediately. As no patch exists, continuous monitoring of administrative activity is essential to detect potential abuse of this file upload mechanism until the vendor provides a permanent remediation.