An issue was discovered in filestash v0.4. The usage of the ssh.InsecureIgnoreHostKey() disables host key verification, possibly allowing attackers to obtain sensitive information via a man-in-the-middle attack.

Default configurations in the ShareProofVerifier function of filestash v0.4 causes the application to skip the TLS certificate verification process when sending out email verification codes, possibly allowing attackers to access sensitive data via a man-in-the-middle attack.