CVE-2026-83537: Unknown Wp Express Checkout

Medium severity, CVSS 5.3. EPSS: 0.2% chance of exploitation in the next 30 days.

The WP Express Checkout WordPress plugin before 2.5.0 does not verify server-side that a payment was actually completed before marking an order as paid, allowing unauthenticated users to forge a completed order without paying.

Affected products

• Unknown Wp Express Checkout: before 2.5.0 (fixed in 2.5.0)

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