# CVE-2025-12788: Business logic in Hydra Booking — Appointment Scheduling & Booking Calendar

> Unauthenticated attackers can bypass payment verification to confirm bookings as paid without actual payment, affecting Hydra Booking plugin users.

- **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:** 11 Nov 2025
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-g9g3-xwvp-8w6r

## What is CVE-2025-12788?

CVE-2025-12788 is a medium-severity vulnerability in themefic Hydra Booking — Appointment Scheduling & Booking Calendar, published on 11 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Hydra Booking — Appointment Scheduling & Booking Calendar plugin for WordPress is vulnerable to missing payment verification to unauthenticated payment bypass in all versions up to, and including, 1.1.27. This is due to the plugin accepting client-controlled payment confirmation data in the tfhb_meeting_paypal_payment_confirmation_callback function without server-side verification with PayPal's API. This makes it possible for unauthenticated attackers to bypass payment requirements and confirm bookings as paid without any actual payment transaction occurring.

Weakness: CWE-602 (Client-Side Enforcement of Server-Side Security)

## Which versions are affected by CVE-2025-12788?


## How do I fix CVE-2025-12788?

No fix has been published for CVE-2025-12788 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-12788 being exploited?

There is no known exploitation of CVE-2025-12788 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-12788 and fix it if it is affected.

What it is: CVE-2025-12788 is a medium-severity vulnerability in themefic Hydra Booking — Appointment Scheduling & Booking Calendar, published on 11 Nov 2025. 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-2025-12788 in the wild and no public exploit code.

Affected product: themefic Hydra Booking — Appointment Scheduling & Booking Calendar. 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-2025-12788/ (Markdown: https://insights.sbomify.com/CVE-2025-12788/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-12788
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-12788
- OSV: https://osv.dev/vulnerability/CVE-2025-12788

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-12788/
Summaries are generated and may contain mistakes; the official description above is the record.