CVE-2026-82911: Roskus Prospero Flow CRM

Medium severity, CVSS 5.1. EPSS: 0.2% chance of exploitation in the next 30 days.

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

• Roskus Prospero Flow CRM: before 5.15.11 (fixed in 5.15.11)

Published 2026-09-04. Last modified 2026-09-09.