# CVE-2026-16067: Event Booking Manager for WooCommerce (Pro) < 5.0.3 - Unauthenticated Payment Bypass via Client-Controlled Ticket Price

> Unauthenticated attackers can bypass payment validation to obtain paid event tickets for free by manipulating client-side price data.

- **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:** 6 Aug 2026
- **Updated:** 7 Aug 2026
- **Also known as:** GHSA-3qf4-97w4-w66g

## What is CVE-2026-16067?

CVE-2026-16067 is a medium-severity vulnerability in Unknown Event Booking Manager for WooCommerce (Pro), published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Event Booking Manager for WooCommerce (Pro) WordPress plugin before 5.0.3 does not validate the ticket price on the server during its native (non-WooCommerce) checkout, trusting the per-ticket price supplied by the client instead of re-deriving the event's configured price. This allows unauthenticated users to book paid event tickets for free, obtaining completed bookings and valid tickets at no cost.

Weakness: CWE-472 (External Control of Assumed-Immutable Web Parameter)

## Which versions are affected by CVE-2026-16067?


## How do I fix CVE-2026-16067?

No fix has been published for CVE-2026-16067 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-16067 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-16067 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-16067 and fix it if it is affected.

What it is: CVE-2026-16067 is a medium-severity vulnerability in Unknown Event Booking Manager for WooCommerce (Pro), published on 6 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-16067 exists.

Affected product: Unknown Event Booking Manager for WooCommerce (Pro). 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-2026-16067/ (Markdown: https://insights.sbomify.com/CVE-2026-16067/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-16067
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-16067
- OSV: https://osv.dev/vulnerability/CVE-2026-16067

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-16067/
Summaries are generated and may contain mistakes; the official description above is the record.