Salon booking system, CVE-2026-17023

CVE, Research URL: CVE-2026-17023
Home page URL: Security reports for Salon booking system
Application: Salon booking system
Published on: Aug 10, 2026
Research Description: The Salon Booking System WordPress plugin through 10.30.33 does not perform any capability check or validate an OAuth state value on its Google Calendar authorization callback, which is also hooked for unauthenticated users, allowing an unauthenticated attacker to overwrite the site's stored Google Calendar connection tokens with attacker-controlled ones and hijack the integration. Exploitation requires the site to have configured its own Google OAuth client for the calendar feature.
Affected versions: max 10.30.33.
Status: vulnerable