# 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.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Sep 2026
- **Updated:** 9 Sep 2026
- **Also known as:** GHSA-wfw6-vjph-f3w6

## 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 (Missing Authorization)

## 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.

## Is CVE-2026-12956 being exploited?

There is no known exploitation of CVE-2026-12956 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-12956 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-12956 in the wild and no public exploit code.

Affected product: arraytics Eventin – Event Calendar, Tickets, Registration, Booking & WooCommerce. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-12956/ (Markdown: https://insights.sbomify.com/CVE-2026-12956/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-12956
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-12956
- OSV: https://osv.dev/vulnerability/CVE-2026-12956

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-12956/
Summaries are generated and may contain mistakes; the official description above is the record.