MarsCTF 1.2.1 has an arbitrary file upload vulnerability in the interface for uploading attachments in the background.Referenceshttps://github.com/b1ackc4t/MarsCTF/blob/V1.2.1/src/main/java/com/b1ackc4t/marsctfserver/service/impl/CTFFileServiceImpl.java#L46https://github.com/b1ackc4t/MarsCTF/issues/10
