Remote code execution via unauthenticated file upload in Bludit CMS (CVE-2026-38329)

Bludit CMS before version 3.18.4 contains two flaws in the API plugin that together enable remote code execution. The POST /api/files/{key} endpoint in bl-plugins/api/plugin.php performs no authorization check and no file extension validation, allowing any holder of a valid API token to upload a malicious PHP script. Once uploaded, the script is stored in a web-accessible path and executed by the server on request. Affected versions: - Bludit < 3.18.4 We recommend updating to: 3.18.4. CVSS 9.8 · our assessment: act_now Reference: https://gist.github.com/Ki1ro0133/8bd14bd4fc6fab81c907d838a7aeee55 Details: https://vuln.today/cve/CVE-2026-38329