<interceptors>
    <interceptor-stack name="appDefault">
        <interceptor-ref name="defaultStack">
            <param name="exception.logEnabled">true</param>
            <param name="exception.logLevel">ERROR</param>
            <param name="params.excludeParams">dojo..*,^struts..*,^session..*,^request..*,^application..*,^servlet(Request|Response)..*,parameters...*</param>
        </interceptor-ref>
    </interceptor-stack>
</interceptors>
                             
<default-interceptor-ref name="appDefault" />

Upgrade Is the best option. 

Redefined defaultStack
<interceptor-stack name="myDefaultStack">
    <interceptor-ref name="exception"/>
    <interceptor-ref name="alias"/>
    <interceptor-ref name="servletConfig"/>
    <interceptor-ref name="i18n"/>
    <interceptor-ref name="prepare"/>
    <interceptor-ref name="chain"/>
    <interceptor-ref name="scopedModelDriven"/>
    <interceptor-ref name="modelDriven"/>
    <interceptor-ref name="fileUpload"/>
    <interceptor-ref name="checkbox"/>
    <interceptor-ref name="datetime"/>
    <interceptor-ref name="multiselect"/>
    <interceptor-ref name="staticParams"/>
    <interceptor-ref name="actionMappingParams"/>
    <interceptor-ref name="params"/>
    <interceptor-ref name="conversionError"/>
    <interceptor-ref name="validation">
        <param name="excludeMethods">input,back,cancel,browse</param>
    </interceptor-ref>
    <interceptor-ref name="workflow">
        <param name="excludeMethods">input,back,cancel,browse</param>
    </interceptor-ref>
    <interceptor-ref name="debugging"/>
    <interceptor-ref name="deprecation"/>
</interceptor-stack>

and define the following constant in struts.xml

<constant name="struts.additional.excludedPatterns" value="^(action|method):.*"/>