CVE-2026-18603 Cancel Order & Request Woocommerce < 1.3.4.34 - Unauthenticated Order Content Disclosure via Reorder AJAX Actions
Unauthenticated attackers can view other customers' order contents and modify logged-in users' carts due to missing authorization checks in the plugin.
- 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-2026-18603?
CVE-2026-18603 is a medium-severity missing authorization vulnerability in Unknown PiWeb Cancel order / Refund request for WooCommerce, published on 9 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The PiWeb Cancel order / Refund request for WooCommerce WordPress plugin before 1.3.4.34 does not have authorization or ownership checks when adding the contents of a previous order to the cart, allowing unauthenticated users to disclose the contents of other customers' orders, as well as to clear and repopulate a logged in user's cart via a crafted link.
Weakness: CWE-862
Which versions are affected by CVE-2026-18603?
How do I fix CVE-2026-18603?
No fix has been published for CVE-2026-18603 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-2026-18603 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18603 exists.
Sources
Also known as GHSA-39g4-r8qh-2jjf.