CVE-2026-89411: Unknown Paymattic

Medium severity, CVSS 5.3. EPSS: 0.1% chance of exploitation in the next 30 days.

The Paymattic WordPress plugin from 4.6.20 before 4.6.26 does not verify that a confirmed Stripe payment belongs to the order it is applied to, allowing unauthenticated users to mark an arbitrary pending order as paid by confirming a smaller payment of their own against it.

Affected products

• Unknown Paymattic: from 4.6.20, before 4.6.26 (fixed in 4.6.26)

Published 2026-09-28. Last modified 2026-09-28.