Is CVE-2026-77694 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-77694 being exploited in the wild.

How severe is CVE-2026-77694?

Medium severity, with a CVSS score of 5.3, published 26 August 2026.

Which products and versions are affected?

Web Ying Eventin before 4.1.19.

Is there a fix for CVE-2026-77694?

A patch was published on 2026-08-26: Fixed in version 4.1.19 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-77694 attacked?

It is attacked over the network.

Am I affected by CVE-2026-77694?

Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-77694: Eventin WordPress plugin authorization bypass in guest checkout

CVE-2026-77694 · Severity: medium · CVSS 5.3 · Published 2026-08-26

Eventin is a WordPress plugin for managing paid events and ticketing. An unauthenticated attacker can bypass payment authorization by manipulating a guest checkout token, allowing them to mark unpaid orders as completed and receive valid paid tickets without making any payment. This directly impacts event revenue and can be exploited repeatedly to issue free tickets to paid events.

Quick answers

Is CVE-2026-77694 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-77694 being exploited in the wild.
How severe is CVE-2026-77694?: Medium severity, with a CVSS score of 5.3, published 26 August 2026.
Which products and versions are affected?: Web Ying Eventin before 4.1.19.
Is there a fix for CVE-2026-77694?: A patch was published on 2026-08-26: Fixed in version 4.1.19 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-77694 attacked?: It is attacked over the network.
Am I affected by CVE-2026-77694?: Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is an authorization bypass (CWE-862) in the Eventin plugin's REST API order handling. The OrderController::update_item endpoint accepts the "update_booking_status" action on guest orders when called with only the order_access_token parameter, without verifying owner or staff capabilities. An unauthenticated attacker can: (1) create a guest order for a paid ticket via POST to /wp-json/eventin/v2/orders, receiving an order_access_token; (2) change the order status to "completed" via PUT to /wp-json/eventin/v2/orders/ORDER_ID with the token, bypassing payment validation. The fix in version 4.1.19 explicitly rejects update_booking_status actions on the token-based endpoint.

Affected products

Web Ying Eventin before 4.1.19

Timeline

2026-08-24: disclosed
2026-08-26: patched: Fixed in version 4.1.19

References

https://wpscan.com/vulnerability/2670eac4-b630-4546-9b56-f19feabfa550/

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