# Booktics – Appointment Booking Calendar for Service Businesses <= 1.0.31 - Unauthenticated Payment Bypass via Currency Manipulation

- **ID:** WPSEC-2026-2053
- **Plugin:** Booktics – Appointment Booking Calendar for Service Businesses (`booktics`), https://wordpress.org/plugins/booktics/
- **Affected versions:** from 1.0.31 before 1.0.32
- **Fixed in:** 1.0.32 (Update to 1.0.32 or later.)
- **Severity:** Medium 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
- **Weakness:** CWE-472
- **Usage among sites WPSec scans:** plugin Low, affected versions None seen (as of 2026-10-30)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/booktics
- **Fix released:** 2026-10-29
- **Published:** 2026-10-30
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2053/

## Description

The Booktics plugin for WordPress is vulnerable to payment manipulation in version 1.0.31, which reverted the fix from 1.0.29. Order creation trusted a buyer-supplied currency even though the total is priced in the store currency, and the Stripe integration accepted any succeeded PaymentIntent as payment without checking its currency, amount or order. This makes it possible for unauthenticated attackers to pay for bookings in a lower-value currency and have them confirmed as paid, on sites that use Stripe payments.

## References

- https://wpsec.com/vuln/WPSEC-2026-2053/
- https://plugins.svn.wordpress.org/booktics/tags/1.0.32/
- https://wordpress.org/plugins/booktics/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2053/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.