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Medium · 5.1 CVE-2026-82911 EUVD-2026-71268GHSA-4758-h5xr-5h97

CSRF in Prospero Flow CRM order confirmation allows unauthorized order state changes

Published Sep 4, 2026 · Updated Sep 4, 2026 · Assigned by Secur0

Description

Cross-Site Request Forgery (CSRF) in the OrderConfirmController at GET /order/confirm/{order_number} in Roskus Prospero Flow CRM before 5.15.11 allows an unauthenticated attacker to confirm any order on behalf of an authenticated user by directing them to a crafted page. Laravel's VerifyCsrfToken middleware enforces CSRF tokens only on POST, PUT, PATCH, and DELETE requests; the Route::get declaration leaves this state-changing action unprotected. Session cookies configured with SameSite=Lax are automatically included in top-level cross-site navigation, so a single link click triggers OrderConfirmController::confirm() and transitions the target order from pending to confirmed without user authorization. Because order numbers are sequential integers, an attacker can enumerate and confirm all existing orders in a single automated sweep.

Affected products

VendorProductAffectedFixed
Roskus Prospero Flow CRM < 5.15.11 5.15.11

References