# CVE-2026-12128: Business logic in Pinpoint Booking System – Version 2

> Unauthenticated attackers can manipulate booking prices by injecting arbitrary values into the cart data parameter, bypassing server-side price validation.

- **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:** 15 Aug 2026
- **Updated:** 17 Aug 2026
- **Also known as:** GHSA-w46h-pcxr-j4fq

## What is CVE-2026-12128?

CVE-2026-12128 is a medium-severity vulnerability in dotonpaper Pinpoint Booking System – Version 2, published on 15 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Pinpoint Booking System – Version 2 plugin for WordPress is vulnerable to Price Manipulation via the `cart_data` parameter in all versions up to, and including, 2.9.9.6.8. This is due to the `dopbsp_woocommerce_add_to_cart` AJAX action being registered via `wp_ajax_nopriv_*` with no authentication, no nonce verification, and no server-side recalculation of pricing — the `update` handler reads `price_total` directly from the attacker-controlled `cart_data` POST parameter and persists it to the database via `$wpdb->insert()` without validating it against the calendar's configured pricing. The `woocommerce_before_calculate_totals` callback subsequently reads the stored attacker-supplied value back from the database and passes it directly to `$product->set_price()` without recomputing from calendar settings. This makes it possible for unauthenticated attackers to override the WooCommerce checkout price of any bookable product tied to a booking calendar to an arbitrary value, effectively enabling the purchase of any such product at a self-chosen price.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2026-12128?


## How do I fix CVE-2026-12128?

No fix has been published for CVE-2026-12128 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-12128 being exploited?

There is no known exploitation of CVE-2026-12128 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-12128 and fix it if it is affected.

What it is: CVE-2026-12128 is a medium-severity vulnerability in dotonpaper Pinpoint Booking System – Version 2, published on 15 Aug 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-2026-12128 in the wild and no public exploit code.

Affected product: dotonpaper Pinpoint Booking System – Version 2. 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-2026-12128/ (Markdown: https://insights.sbomify.com/CVE-2026-12128/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-12128
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-12128
- OSV: https://osv.dev/vulnerability/CVE-2026-12128

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-12128/
Summaries are generated and may contain mistakes; the official description above is the record.