Cross-Site Request Forgery (CSRF) occurs in the `OrderConfirmController` at the 'GET /order/confirm/{order number}' endpoint. This issue arises because the `Route::get` declaration allows state-changing actions to bypass the `VerifyCsrfToken` middleware, which only enforces tokens on POST, PUT, PATCH, and DELETE requests. Since session cookies with `SameSite=Lax` are included in top-level cross-site navigation, an unauthenticated attacker can trick an authenticated user into clicking a crafted link to trigger the `confirm()` function. This transitions orders from pending to confirmed without authorization. Additionally, because the `order number` variable uses sequential integers, an attacker can enumerate and confirm all existing orders.