CVE-2026-12956 Missing authorization in Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce
Unauthenticated attackers can create fake completed orders to exhaust ticket inventory in the Eventin WordPress 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-2026-12956?
CVE-2026-12956 is a medium-severity missing authorization vulnerability in arraytics Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce, published on 9 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The WP Event Solution (Eventin) plugin for WordPress is vulnerable to Missing Authorization in versions up to, and including, 4.1.22 via the create_item() handler for the /wp-json/eventin/v2/orders REST endpoint. The endpoint's create_item_permissions_check() function only verifies a wp_rest nonce (which is leaked to every visitor through the etn-public script's localized_data_obj on every frontend page) and accepts a user-supplied 'status' value in prepare_item_for_database() with no whitelist validation. This makes it possible for unauthenticated attackers to create etn-order posts with status='completed' that are counted as sold by etn_get_sold_tickets_by_event(); because the auto-cleanup wp_schedule_single_event() in create_item() only fires for status='pending' orders, the forged completed orders persist indefinitely and exhaust ticket inventory.
Weakness: CWE-862
Which versions are affected by CVE-2026-12956?
How do I fix CVE-2026-12956?
No fix has been published for CVE-2026-12956 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-2026-12956 being exploited?
There is no known exploitation of CVE-2026-12956 in the wild and no public exploit code.
Sources
Also known as GHSA-wfw6-vjph-f3w6.