CVE-2026-77694: Unknown Eventin

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

The Eventin WordPress plugin before 4.1.19 does not properly restrict which changes a guest checkout token is allowed to authorise on an order, allowing unauthenticated users to mark their own unpaid order as completed and be issued a valid paid ticket with no payment taken.

Affected products

• Unknown Eventin: before 4.1.19 (fixed in 4.1.19)

Published 2026-08-26. Last modified 2026-08-26.