CVE-2026-12956: CWE-862 Missing Authorization in arraytics Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce
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.
CVSS v3.1
Score 5.3medium
Affected software
arraytics
Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-12956 describes a missing authorization vulnerability (CWE-862) in the Eventin plugin for WordPress, affecting versions up to 4.1.22. The vulnerability exists in the create_item() handler for the /wp-json/eventin/v2/orders REST endpoint. The endpoint's permission check relies solely on a wp_rest nonce that is exposed to all visitors via a frontend script, allowing unauthenticated users to bypass authorization. Additionally, the 'status' parameter accepted by prepare_item_for_database() is not validated against a whitelist, enabling attackers to submit orders with status='completed'. These forged orders are counted as sold tickets and are not cleaned up automatically, which can lead to exhaustion of ticket inventory.
Potential Impact
An unauthenticated attacker can create fake completed orders that reduce available ticket inventory, potentially causing denial of service for legitimate buyers by exhausting ticket availability. The vulnerability does not impact confidentiality or availability of the system but affects integrity of ticket sales data.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the REST endpoint if possible or monitor for suspicious order creation activity. Avoid relying solely on wp_rest nonce for authorization in exposed endpoints.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-06-22T21:20:42.007Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aa0c683acd9273b499885de
Added to database: 09/09/2026, 02:37:55 UTC
Last enriched: 09/09/2026, 03:07:38 UTC
Last updated: 10/23/2026, 15:10:11 UTC
Views: 59
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