CVE-2026-12956

Eventin <= 4.1.22 - Missing Authorization to Unauthenticated Arbitrary Order Creation and Status Manipulation via 'status' Parameter

View on CVE.org

Published Sep 9, 2026 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed

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.

Analysis

Technical impact

The Eventin plugin for WordPress fails to properly authorize the REST endpoint used to create orders. The API accepts a user-supplied 'status' field without whitelisting, allowing an unauthenticated attacker to create completed orders that are counted as sold. This flaw can cause purchase volume to increase illegitimately, deplete ticket inventory, and effectively deny service to legitimate customers.

Affected Systems

Any WordPress site that has the Eventin plugin installed with a version of 4.1.22 or earlier is impacted. The vulnerability exists in the create_item() handler and its permission check within the /wp-json/eventin/v2/orders endpoint.

Risk and Exploitability

The CVSS score of 5.3 indicates moderate severity. EPSS is not available, and the vulnerability is not listed in the CISA KEV catalog, indicating limited evidence of exploitation in the wild. The attack vector is a publicly accessible REST route that does not require authentication; therefore, the barrier to exploitation is low and a site admin can exploit the flaw from any user or guest role.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

arraytics

Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce

unaffected

Version	Status	Constraints
`0`	affected	≤ 4.1.22

No data.

Vendor Product Versions

Arraytics

Eventin – Event Calendar, Event Registration, Tickets & Booking (ai Powered)

Version	Status	Scheme	Platform
`[0,4.1.22]`	affected	generic	—

Wordpress

Version	Status	Scheme	Platform
`—`	unaffected	—	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Upgrade Eventin to a version newer than 4.1.22.
If upgrade is not immediately possible, block unauthenticated access to the /wp-json/eventin/v2/orders endpoint using a security plugin or .htaccess rule.
After remediation, monitor order records for unexpected completed orders and verify inventory counts for anomalies.

Generated by OpenCVE AI on September 9, 2026 at 05:12 UTC.

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.413% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact partial

References

Link	Providers
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L1325
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L413
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L733
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/utils/helper.php#L4558
https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/utils/locale/vars.php#L35
https://plugins.trac.wordpress.org/changeset?reponame=&old=3668637%40wp-event-solution&new=3668637%40wp-event-solution
https://www.wordfence.com/threat-intel/vulnerabilities/id/5e87a9ac-e7c6-4622-b3e5-6e17e7664317?source=cve

History

Sep 13, 2026 8:30 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Arraytics Arraytics eventin – Event Calendar, Event Registration, Tickets & Booking (ai Powered) Wordpress Wordpress wordpress
Vendors & Products		Arraytics Arraytics eventin – Event Calendar, Event Registration, Tickets & Booking (ai Powered) Wordpress Wordpress wordpress

Sep 9, 2026 2:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Sep 9, 2026 2:30 AM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
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.
Title		Eventin <= 4.1.22 - Missing Authorization to Unauthenticated Arbitrary Order Creation and Status Manipulation via 'status' Parameter
Weaknesses		CWE-862
References		https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L1325 https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L413 https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/core/Order/OrderController.php#L733 https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/utils/helper.php#L4558 https://plugins.trac.wordpress.org/browser/wp-event-solution/tags/4.1.15/utils/locale/vars.php#L35 https://plugins.trac.wordpress.org/changeset?reponame=&old=3668637%40wp-event-solution&new=3668637%40wp-event-solution https://www.wordfence.com/threat-intel/vulnerabilities/id/5e87a9ac-e7c6-4622-b3e5-6e17e7664317?source=cve
Metrics		cvssV3_1 `{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'}`