CVE-2026-13399 Payment Plugins for PayPal WooCommerce < 2.0.20 - Unauthenticated Payment Bypass via Reuse of a Completed PayPal Order
Unauthenticated attackers can bypass payment processing by reusing completed PayPal orders via an unprotected REST endpoint in the WooCommerce plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-13399?
CVE-2026-13399 is a high-severity missing authorization vulnerability in Unknown Payment Plugins for PayPal WooCommerce, published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Payment Plugins for PayPal WooCommerce WordPress plugin before 2.0.20 does not have proper authorization checks on a REST endpoint, allowing unauthenticated users to bypass payments
Which versions are affected by CVE-2026-13399?
How do I fix CVE-2026-13399?
No fix has been published for CVE-2026-13399 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-13399 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-13399 exists.
Sources
Also known as GHSA-frpp-mq58-xvp7.