CVE-2026-39389: CI4MS has a Hidden Items Authorization Bypass in Fileeditor Allows Reading Secrets and Writing Protected Files

The Fileeditor controller defines a hiddenItems array containing security-sensitive paths (.env, composer.json, vendor/, .git/) but only enforces this protection in the listFiles() method. The readFile(), saveFile(), deleteFileOrFolder(), renameFile(), createFile(), and createFolder() endpoints perform no hidden items validation, allowing direct API access to files that are intended to be protected. A backend user with only fileeditor.read permission can exfiltrate application secrets from .env, and a user with fileeditor.update permission can overwrite composer.json to achieve remote code execution.