CVE-2026-9027 Security feature bypass in CorvusPay WooCommerce Payment Gateway
Unauthenticated attackers can bypass payment verification to mark orders as paid, obtaining goods without payment.
- 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-2026-9027?
CVE-2026-9027 is a medium-severity vulnerability in corvusinfo CorvusPay WooCommerce Payment Gateway, published on 9 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The CorvusPay WooCommerce Payment Gateway plugin for WordPress is vulnerable to Payment Bypass via Improper Verification of Cryptographic Signature in all versions up to, and including, 2.7.4. The `corvuspay_success_handler` function registers the REST endpoint `POST /wp-json/corvuspay/success/` with `'permission_callback' => '__return_true'`, and while it calls `$this->client->validate->signature()` and stores the boolean result in `$res`, the result is never evaluated in a conditional — it is only written to the debug log — causing execution to unconditionally reach `$order->payment_complete()` regardless of whether the cryptographic signature is valid. This makes it possible for unauthenticated attackers to mark any pending WooCommerce order as fully paid by sending a POST request to the success endpoint containing an arbitrary or forged signature value, allowing them to obtain goods or services without payment. Because WooCommerce order IDs are sequential integers, target orders are trivially enumerable via the `order_number` POST parameter, requiring no prior knowledge of the victim order.
Weakness: CWE-347
Which versions are affected by CVE-2026-9027?
How do I fix CVE-2026-9027?
No fix has been published for CVE-2026-9027 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-9027 being exploited?
There is no known exploitation of CVE-2026-9027 in the wild and no public exploit code.
Sources
Also known as GHSA-g5m6-f674-9758.