CVE-2026-40768: Salon Booking System IDOR Vulnerability

CVE-2026-40768 Overview

CVE-2026-40768 is an unauthenticated Insecure Direct Object Reference (IDOR) vulnerability affecting the Salon booking system WordPress plugin in versions up to and including 10.30.24. The flaw allows remote attackers to access or manipulate resources belonging to other users without authentication. The vulnerability is classified under CWE-639: Authorization Bypass Through User-Controlled Key.

The issue was published to the National Vulnerability Database (NVD) on June 17, 2026, and carries a network attack vector with no privileges or user interaction required.

Critical Impact
Unauthenticated attackers can reference internal booking objects directly over the network, potentially exposing or modifying customer reservation data on affected WordPress sites.

Affected Products

Salon booking system WordPress plugin versions <= 10.30.24
WordPress installations using the vulnerable plugin
Salon and appointment booking deployments relying on default plugin authorization

Discovery Timeline

2026-06-17 - CVE-2026-40768 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2026-40768

Vulnerability Analysis

The Salon booking system plugin exposes object identifiers (such as booking IDs, customer IDs, or reservation references) through request parameters without verifying that the requester is authorized to act on the referenced object. An unauthenticated user can substitute these identifiers in HTTP requests to access records belonging to other users.

Because the attack vector is network-based and requires no authentication or user interaction, exploitation can be automated against any reachable WordPress site running a vulnerable version. The Exploit Prediction Scoring System (EPSS) places this issue in the 20.3 percentile, and no public proof-of-concept is currently listed.

Root Cause

The root cause is missing authorization enforcement on object lookups. The plugin trusts client-supplied identifiers when retrieving or modifying booking-related records, instead of validating ownership against the authenticated session. This pattern aligns directly with [CWE-639], where authorization decisions are made using user-controlled keys.

Attack Vector

An attacker sends crafted HTTP requests to plugin endpoints, iterating or guessing booking, customer, or appointment identifiers. The server returns or modifies data tied to those identifiers without checking the requester's identity or ownership.

No verified exploit code is publicly available. Refer to the Patchstack Vulnerability Report for vendor-coordinated technical details.

Detection Methods for CVE-2026-40768

Indicators of Compromise

Unauthenticated HTTP requests to Salon booking system endpoints referencing sequential or enumerated booking, customer, or reservation IDs.
Web server logs showing repeated GET or POST requests to plugin endpoints from a single source with varying object identifiers.
Unexpected access patterns to administrative or customer-only booking resources without an authenticated session cookie.

Detection Strategies

Monitor WordPress access logs for high-volume parameter enumeration against URLs containing salon-booking-system or related plugin slugs.
Inspect request patterns where object identifiers (e.g., booking_id, customer_id) increment sequentially from a single IP or user agent.
Correlate anonymous (unauthenticated) requests against endpoints that should require an active customer session.

Monitoring Recommendations

Enable verbose access logging on the WordPress front-end and review logs for unauthenticated access to plugin AJAX or REST routes.
Deploy a Web Application Firewall (WAF) rule set that flags ID enumeration patterns against booking plugin endpoints.
Track plugin version inventory across all hosted WordPress sites to identify instances running 10.30.24 or earlier.

How to Mitigate CVE-2026-40768

Immediate Actions Required

Identify any WordPress installations running Salon booking system version 10.30.24 or earlier.
Update the plugin to a fixed release as published by the vendor on the Patchstack advisory page.
Review booking and customer records for unauthorized access or modification since the plugin was deployed.

Patch Information

The vendor has addressed the vulnerability in a release published after version 10.30.24. Administrators should consult the Patchstack Vulnerability Report for the fixed version number and apply the update through the WordPress plugin manager.

Workarounds

Temporarily deactivate the Salon booking system plugin until the patched version can be installed.
Restrict access to plugin endpoints using WAF rules that require authenticated session cookies for booking-related routes.
Place the WordPress site behind an authentication gateway or IP allowlist for administrative review until remediation is complete.

bash

# Configuration example: WordPress CLI plugin update
wp plugin update salon-booking-system --version=<fixed-version>
wp plugin list --name=salon-booking-system --fields=name,status,version