Security vulnerabilities and automated fixes for flask issues
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A medium-severity vulnerability was discovered and patched in an IoT Over-the-Air (OTA) firmware update server, where a Flask route accepted firmware file uploads without any authentication. This flaw allowed any attacker with network access to push arbitrary firmware binaries to connected IoT devices — a potentially devastating supply chain attack vector. The fix introduces proper authentication controls, closing the door on unauthorized firmware injection.
A critical security vulnerability was discovered and patched in a Flask REST API endpoint that accepted image file uploads without any validation, size limits, or sandboxing. An attacker could exploit this flaw to upload malicious files disguised as images, potentially leading to remote code execution or exploitation of image-parsing libraries. The fix enforces strict file type validation, magic byte inspection, and upload size limits to close this dangerous attack vector.