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https://issues.apache.org/jira/browse/WW-3973?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13564296#comment-13564296
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Lukasz Lenart commented on WW-3973:
-----------------------------------
Added warning to the docs
https://cwiki.apache.org/confluence/display/WW/Parameters+Interceptor
> WW-3866 overrides ParameterNameAware decision with interceptor settings
> -----------------------------------------------------------------------
>
> Key: WW-3973
> URL: https://issues.apache.org/jira/browse/WW-3973
> Project: Struts 2
> Issue Type: Bug
> Affects Versions: 2.3.7
> Reporter: Christoph Lenggenhager
> Fix For: 2.3.9
>
>
> The fix for WW-3866 (Revision 1379386) changes the logic for acceptable
> parameter names from
> {code:title=com.opensymphony.xwork2.interceptor.ParametersInterceptor, line
> 282ff.}
> boolean acceptableName = acceptableName(name)
> && (parameterNameAware == null ||
> parameterNameAware.acceptableParameterName(name));
> {code}
> to
> {code:title=com.opensymphony.xwork2.interceptor.ParametersInterceptor, line
> 282ff.}
> boolean acceptableName = acceptableName(name)
> || (parameterNameAware != null &&
> parameterNameAware.acceptableParameterName(name));
> {code}
> This might impose a security risk if implementations relied on their actions
> for parameter name validation (e.g. by explicitly whitelisting parameters).
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