CVE-2026-17020

Salon Booking System – Free Version < 10.31.3 - Insecure Direct Object Reference to Authenticated (Subscriber+) Arbitrary Booking PII Disclosure

2026-08-06 00:00
Muni Nitish Kumar Yaddala

Strategic Overview

Status
Patched in 10.31.3
Affected Plugin
Salon Booking System – Appointment Booking for Salons, Barbershops & Spas
Affected Version
< 10.31.3
CVSS
4.3Medium
Weakness type
CWE-639 · Authorization Bypass Through User-Controlled Key
CVE
CVE-2026-17020
View all Salon Booking System – Appointment Booking for Salons, Barbershops & Spas vulnerabilities

At a glance

CVE-2026-17020 is a medium-severity Authorization Bypass Through User-Controlled Key vulnerability in the Salon Booking System WordPress plugin, affecting versions < 10.31.3. 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 10.31.3; sites on affected versions should update now. Disclosed August 2026, reported by Muni Nitish Kumar Yaddala.

Vulnerability Overview

The Salon Booking System – Free Version plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and excluding, 10.31.3. This is due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with subscriber-level access and above, to perform an unauthorized action.

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-639: Authorization Bypass Through User-Controlled Key

Reaching this weakness in Salon Booking System < 10.31.3 takes an account at Subscriber level or above. Authorization bypass through a user-controlled key, often called insecure direct object reference, means the application looks up a record by an identifier from the request without checking that the caller owns it.

Changing a number in the request is enough to read or modify other users' records, which on commerce and membership sites means customer data. For Salon Booking System the fix is 10.31.3: builds < 10.31.3 are affected, anything from 10.31.3 onward is not.

Remediation

Update to version 10.31.3, 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 10.31.3 closes this, and updating the plugin is the step that ends it.

  • Login Security
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-17020https://www.wordfence.com/threat-intel/vulnerabilities/id/f9691ccf-269e-4154-b524-8587644fde24https://nvd.nist.gov/vuln/detail/CVE-2026-17020

Related records

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