Stored cross-site scripting vulnerability exists in EC-CUBE Web API Plugin. When there are multiple users using OAuth Management feature and one of them inputs some crafted value on the OAuth Management page, an arbitrary script may be executed on the web browser of the other user who accessed the management page.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.