CVE-2026-16990 Payment Button for PayPal <= 1.2.3.44 - Unauthenticated Payment Price Manipulation
Unauthenticated attackers can manipulate payment amounts in the PayPal WordPress plugin, allowing them to create orders for arbitrary lower prices.
- 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-2026-16990?
CVE-2026-16990 is a medium-severity vulnerability in Unknown Payment Button for PayPal, published on 12 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Payment Button for PayPal WordPress plugin through 1.2.3.44 does not enforce the merchant-configured price server-side and trusts a client-supplied payment amount, allowing unauthenticated attackers to create a real PayPal order against the merchant for an arbitrary lower amount.
Which versions are affected by CVE-2026-16990?
How do I fix CVE-2026-16990?
No fix has been published for CVE-2026-16990 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-16990 being exploited?
There is no known exploitation of CVE-2026-16990 in the wild and no public exploit code.
Sources
Also known as GHSA-4h7v-8qrm-x2jj.