CVE-2026-0656 Missing authorization in iPaymu Payment Gateway for WooCommerce
Unauthenticated attackers can bypass payment validation to mark orders as paid and expose customer PII via webhook endpoints.
- 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-2026-0656?
CVE-2026-0656 is a high-severity missing authorization vulnerability in iPaymu Payment Gateway for WooCommerce, published on 7 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The iPaymu Payment Gateway for WooCommerce plugin for WordPress is vulnerable to Missing Authentication in all versions up to, and including, 2.0.2 via the 'check_ipaymu_response' function. This is due to the plugin not validating webhook request authenticity through signature verification or origin checks. This makes it possible for unauthenticated attackers to mark WooCommerce orders as paid by sending crafted POST requests to the webhook endpoint without any payment occurring, as well as enumerate order IDs and obtain valid order keys via GET requests, exposing customer order PII including names, addresses, and purchased products.
Weakness: CWE-862
Which versions are affected by CVE-2026-0656?
How do I fix CVE-2026-0656?
No fix has been published for CVE-2026-0656 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-2026-0656 being exploited?
There is no known exploitation of CVE-2026-0656 in the wild and no public exploit code.
Sources
Also known as GHSA-9j5j-4qcf-3wmv.