In Bitcoin Knots v0.11.0.ljr20150711 through v0.13.0.knots20160814 (fixed in v0.13.1.knots20161027), the debug console stores sensitive information including private keys and the wallet passphrase in its persistent command history.Referenceshttp://www.securityfocus.com/bid/94235https://bitcointalk.org/index.php?topic=1618462.0https://github.com/bitcoinknots/bitcoin/blob/v0.13.1.knots20161027/doc/release-notes.md