Unauthenticated Arbitrary File Upload RCE in Delta Sql 1.8.2 docs_upload.php

Successful exploitation allows an unauthenticated remote attacker to upload and execute arbitrary PHP code on the target server. This can lead to full compromise of the application in the context of the web server process, including theft or modification of application data, deployment of web shells or other malware, and potential further system compromise depending on server configuration and privileges.

Restrict network access to the vulnerable application where possible. Disable or remove the vulnerable upload functionality if it is not required. Configure the web server so that files in the upload directory cannot be executed as PHP or any other server-side script. Apply allowlisting for permitted extensions and MIME types, enforce authentication on upload endpoints, and monitor for suspicious POST requests to docs_upload.php and unexpected files appearing in upload paths.

Upgrade to a fixed version if one is available from the vendor or project maintainers. If no patched release is available, modify docs_upload.php and related upload handling to enforce strict server-side validation of allowed file types, reject executable script uploads such as .php, verify content independently of client-supplied metadata, store uploads outside the web-accessible document root, and disable execution permissions in the upload directory. Review the application for any previously uploaded malicious files and remove them.