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Salon Booking System <= 10.31.10 — Unauthenticated Negative Booking Total Creation

CVE-2026-110034Published · Updated

Action summary

Affected: ≤10.31.10Update to 10.31.11 or newer

All remediation steps
Watch plugin
Severity
Medium5.3
CVSS
5.3
CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
What does this vector mean?
AV:N Attack vector
Network
AC:L Attack complexity
Low
PR:N Privileges required
None
UI:N User interaction
None
S:U Scope
Unchanged
C:N Confidentiality
None
I:L Integrity
Low
A:N Availability
None
Weakness
CWE-602 Client-Side Enforcement of Server-Side Security
Required access
No account needed
Exploit prediction (EPSS)
No score
CISA KEV
Not listed
On this page8

Am I affected?

Salon Booking System – Appointment Booking for Salons, Barbershops & Spas salon-booking-system

  1. Affected≤ 10.31.10
  2. Patched in10.31.11

Update to 10.31.11 or newer.

You are affected if you run ≤ 10.31.10. Version 10.31.11 and later are not affected by this issue.

  • Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Salon Booking System – Appointment Booking for Salons, Barbershops & Spas.
  • No admin access? Run a passive check of your site. It reads public files only.
  • No account is needed to exploit this. Treat any exposed site on an affected version as at risk.

What to do

  1. Update to version 10.31.11, or a newer patched version
  2. Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
  3. Watch Salon Booking System – Appointment Booking for Salons, Barbershops & Spas to get an email when the next vulnerability is published.

Advisory

Source description from Wordfence Intelligence, credited to vuxvinh.

The Salon Booking System plugin for WordPress is vulnerable to Payment Bypass in all versions up to, and including, 10.31.10. This is due to missing lower-bound enforcement when subtracting a fixed-amount discount from a booking total, allowing the result to go below zero. This makes it possible for unauthenticated attackers to create confirmed bookings with a negative total by supplying a fixed-amount discount code whose value exceeds the booking price. A valid discount code must exist in the system.

Exploits & references

Proof-of-concept & detection

No public proof-of-concept or detection template is known for this vulnerability.

Advisories & patches

More in Salon Booking System – Appointment Booking for Salons, Barbershops & Spas

All 50
More vulnerabilities in Salon Booking System – Appointment Booking for Salons, Barbershops & Spas
SeverityVulnerabilityCVEPublished
Medium4.3Missing Authorization
≤10.31.10Update to 10.31.11
CVE-2026-110032
High8.810.31.10 - Authenticated (Salon Staff+) Privilege Escalation
10.17 – 10.31.10Update to 10.31.11
CVE-2026-110031
Medium6.4Authenticated (Salon Staff+) Stored Cross-Site Scripting
≤10.31.10Update to 10.31.11
CVE-2026-110033
Medium4.3Missing Authorization
≤10.31.10Update to 10.31.11
CVE-2026-110035
High7.2Unauthenticated Stored Cross-Site Scripting via Custom Checkout Field (Html/File Type) via Public Booking AJAX
≤10.31.9Update to 10.31.10
CVE-2026-109232

Timeline

  1. CVE published

    Severity medium, CVSS 5.3

  2. Record last updated

Sources & licenses

Wordfence record
Vulnerability data
Wordfence Intelligence. [object Object] Licensed under the CC BY-SA 4.0.
CVE® identifiers
[object Object]. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
CVSS / CWE
National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
VulnCrest content
Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.

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