---
id: "CVE-2026-110034"
kind: "vulnerability"
aliases: ["CVE-2026-110034"]
title: "Salon Booking System WordPress plugin: negative booking totals via discount code"
severity: "low"
cvss: 3.7
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "salon-booking-system", "self-hosted", "wordpress"]
not_affected_if: ["no-fixed-amount-discounts", "plugin-version-10.31.11-or-later"]
published_at: "2026-10-19T07:16:30+00:00"
first_seen_at: "2026-10-23T21:57:17+00:00"
updated_at: "2026-10-25T04:45:15+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-110034", "first_seen_at": "2026-10-23T21:57:17+00:00"}]
---

# Salon Booking System WordPress plugin: negative booking totals via discount code

The Salon Booking System WordPress plugin before 10.31.11 does not stop a fixed-amount discount from pushing a booking's total below zero. An unauthenticated visitor who knows a valid discount code can create a confirmed booking stored with a negative total.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed plugin version in the WordPress admin plugin list or in the plugin header of `wp-content/plugins/salon-booking-system/`; versions below `10.31.11` are affected.
- Review bookings for negative totals if fixed-amount discount codes are in use.

## Fix

- Update the Salon Booking System plugin to `10.31.11` or later.

## Timeline

- 2026-10-23T21:57:17+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-110034

## From the sources

The Salon Booking System WordPress plugin before 10.31.11 does not enforce a minimum of zero when subtracting a fixed-amount discount from a booking's total, allowing an unauthenticated visitor who knows a valid discount code to create a confirmed booking stored with a negative total.

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