When the Wss4jSecurityInterceptor replaces the AxiomMessage in the SoapMessage, if the original SoapMessage already had a SoapAction set, the value is lost.

I believe, in the Wss4jSecurityInterceptor.replaceMessage() method, the following workaround should be done:

// replace the Axiom message
String tempSoapAction = soapMessage.getSoapAction();

axiomMessage.setAxiomMessage(newMessage);

soapMessage.setSoapAction(tempSoapAction);