CVE-2026-17016 Restore PayPal Standard for WooCommerce <= 3.1.0 - Payment Bypass via PDT Underpayment
Attackers can bypass payment validation to mark orders as paid while underpaying when the PayPal Data Transfer feature is enabled.
- 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-2026-17016?
CVE-2026-17016 is a low-severity vulnerability in Unknown Accept PayPal & Stripe with Subscriptions for WooCommerce, published on 10 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Accept PayPal & Stripe with Subscriptions for WooCommerce WordPress plugin through 3.1.0 does not validate the amount actually paid against the order total in its PayPal Data Transfer return handler, allowing a customer to pay less than the order total and still have the order marked as fully paid when the PayPal Data Transfer feature is enabled.
Weakness: CWE-284
Which versions are affected by CVE-2026-17016?
How do I fix CVE-2026-17016?
No fix has been published for CVE-2026-17016 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-17016 being exploited?
There is no known exploitation of CVE-2026-17016 in the wild and no public exploit code.
Sources
Also known as GHSA-3gq9-83xc-rrc7.