Eventin lets guests mark unpaid orders completed
Eventin before 4.1.19 does not constrain the changes authorized by a guest checkout token. An unauthenticated user can mark their own unpaid order completed and receive a valid paid ticket without payment.
- Component
- Eventin
- Plugin slug
wp-event-solution- Affected
- < 4.1.19
- Safe version
4.1.19- Published
- Aug 26, 2026
- Weakness
- CWE-862 — Missing Authorization
This CVE was published Aug 26, 2026 and is one of 45 known issues for this plugin.
Update, patch or deactivate.
Update to 4.1.19 or later and reconcile completed guest orders, issued tickets, and payment records for underpayment or missing payment.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
The Eventin WordPress plugin before 4.1.19 does not properly restrict which changes a guest checkout token is allowed to authorise on an order, allowing unauthenticated users to mark their own unpaid order as completed and be issued a valid paid ticket with no payment taken.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N