# CVE-2026-87892: Rox Appointment Booking price and payment method bypass

Source: https://junglewise.ai/threats/cve-2026-87892-rox-appointment-booking-price-and-payment-method-bypass  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-12. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-87892 · Severity: medium · CVSS 5.3 · Published 2026-09-12

The Rox Appointment Booking WordPress plugin allows unauthenticated attackers to create bookings at any price they choose and bypass payment method restrictions. An attacker can book a service worth $100 for just $0.01 or force payment methods that are not enabled on the site. This enables fraud by allowing customers to pay less than the actual service cost or use prohibited payment methods.

## Quick answers

**Is CVE-2026-87892 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-87892 being exploited in the wild.

**How severe is CVE-2026-87892?** Medium severity, with a CVSS score of 5.3, published 12 September 2026.

**Which products and versions are affected?** Rox Appointment Booking before 1.2.0.

**Is there a fix for CVE-2026-87892?** A patch was published on 2026-09-12: Fixed in version 1.2.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-87892 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-87892?** 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 a broken access control flaw in the plugin's public REST API booking endpoint. The endpoint accepts the order total and payment method directly from client requests without validating them against server-side configuration. An unauthenticated attacker can POST to /rox-appointment-booking/v1/public/booking with arbitrary values for amount and payment_type; the server does not re-verify the service price or check whether the selected payment method is actually enabled. The only validation present is that the amount cannot be zero. An attacker can thus create confirmed bookings at any positive price and with any payment method, consuming available appointment slots while bypassing payment restrictions. The fix was released in version 1.2.0.

## Affected products

- Rox Appointment Booking before 1.2.0

## Timeline

- 2026-09-10: disclosed
- 2026-09-12: patched: Fixed in version 1.2.0

## References

- [https://wpscan.com/vulnerability/971084b9-5bf9-438a-a94d-435d1b1f01d1/](https://wpscan.com/vulnerability/971084b9-5bf9-438a-a94d-435d1b1f01d1/)