The MStore API WordPress plugin before 4.22.1 does not restrict which fields of an order a customer may update, allowing any authenticated user with a self-registerable account to change the status of their own unpaid order to a paid or fulfilled state and receive the goods without paying.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
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