CVE-2026-11887

Salon Booking System <= 10.30.19 - Missing Authorization to Authenticated (Subscriber+) Booking Approval Bypass

2026-08-10 00:00

Strategic Overview

Status: Patched in 10.30.20
Affected Plugin: Salon Booking System – Appointment Booking for Salons, Barbershops & Spas
Affected Version: <= 10.30.19
CVSS: 4.3Medium
Weakness type: CWE-602 · Client-Side Enforcement of Server-Side Security
CVE: CVE-2026-11887

View all Salon Booking System – Appointment Booking for Salons, Barbershops & Spas vulnerabilities

At a glance

CVE-2026-11887 is a medium-severity Client-Side Enforcement of Server-Side Security vulnerability in the Salon Booking System WordPress plugin, affecting versions <= 10.30.19. It carries a CVSS score of 4.3 (reachable over the network; low attack complexity). Exploitation requires an authenticated account at Subscriber level or above. The issue is fixed in version 10.30.20; sites on affected versions should update now. Disclosed August 2026, reported by Kevin.

Vulnerability Overview

The Salon Booking System plugin for WordPress is vulnerable to Missing Authorization in versions up to, and including, 10.30.19. This is due to missing capability check and nonce verification on the SetBookingStatus and SetDefaultBookingStatus AJAX handlers. This makes it possible for authenticated attackers, with subscriber-level access and above, to change the approval status of any booking without authorization.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user.

CWE-602: Client-Side Enforcement of Server-Side Security

The product is composed of a server that relies on the client to implement a mechanism that is intended to protect the server.

Remediation

Update to version 10.30.20, or a newer patched version

How does WordSec protect against this?

Because it turns on account access, WordSec's login security is the relevant layer: role-based two-factor, captcha and brute-force limits raise the cost of getting the account this needs. None of that substitutes for the fix: Salon Booking System 10.30.20 closes this, and updating the plugin is the step that ends it.

Login Security
Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-11887 https://www.wordfence.com/threat-intel/vulnerabilities/id/88089d8e-9040-482d-b0e5-d2412885f390 https://nvd.nist.gov/vuln/detail/CVE-2026-11887

Related records

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

CVSS Vector

4.3

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityNone

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