CVE-2026-103299 nexi Alpha Bank for WooCommerce <= 2.2.0 - Unauthenticated Payment Confirmation Forgery via Empty Shared Secret
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-103299?
CVE-2026-103299 is a vulnerability in Unknown Payment Gateway, published on 26 Oct 2026.
Official description
The Payment Gateway WordPress plugin through 2.2.0 does not ensure a shared secret is configured before using it to authenticate the bank's payment-notification callback, allowing unauthenticated attackers to forge a valid notification and mark any WooCommerce order as paid on installs where the secret has not been set, and the same callback lets them move any pending order to a failed state whether or not the secret is configured.
Which versions are affected by CVE-2026-103299?
How do I fix CVE-2026-103299?
No fix has been published for CVE-2026-103299 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-103299 being exploited?
There is no known exploitation of CVE-2026-103299 in the wild and no public exploit code.
Sources
Also known as GHSA-3fmh-h32q-9jjr.