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Dynamic Method Invocation is a know vulnerable mechanismmechanism known to impose possible security vulnerabilities, but till until now it was enabled by default with warning that users should switch it off if possible.

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Note
titleBackward Compatibility

Disabling Dynamic Method Invocation can break your application if it uses DMI heavily. Nevertheless, please consider to refactor your application to avoid DMI.

Warning

It is strongly recommended to upgrade to Struts 2.3.15.2, which contains the corrected Struts2-Core library.