CVE-2026-13171: Unknown Eventin

High severity, CVSS 8.2. EPSS: 0.3% chance of exploitation in the next 30 days.

The Eventin WordPress plugin before 4.1.20 does not perform an authorization check on its waiting-list registration handler, allowing unauthenticated users to create WordPress user accounts for arbitrary email addresses and inject order records.

Affected products

• Unknown Eventin: before 4.1.20 (fixed in 4.1.20)

Published 2026-08-12. Last modified 2026-08-26.