GHSA-2QH5-382H-3JPC CakePHP: SmtpTransport vulnerable to CRLF header injection

Impact Custom mail headers added with Message::setHeaders or addHeaders do not have CRLF replaced allowing header injection if user controlled data is added to message headers without stripping CRLF bytes. Patches 5.3.7, 5.2.14, 5.1.9, 4.6.5, 4.5.12 contain fixes for this issue. Workarounds You c...