The application does not properly validate the 'context_file_name' before using it to read a file. This can lead to directory traversal attacks where an attacker can specify a path to a sensitive file, allowing them to read arbitrary files from the filesystem.
The application uses a hardcoded IP address (http://183.82.116.237:8021/answer) for an external API endpoint, which does not change and is not configurable.
The application allows all origins (origins = ['*']) to access its API, which can lead to Cross-Origin Resource Sharing (CORS) issues and unauthorized data exposure.