Executive brief
The Salon Booking System WordPress plugin contains an access control flaw in its REST API that allows any authenticated user—including low-privilege accounts like subscribers—to view other customers' booking information by guessing or enumerating booking identifiers. An attacker with a free account can expose sensitive personal data including names, email addresses, phone numbers, physical addresses, and private notes from any booking in the system.
Technical details
The vulnerability is an Insecure Direct Object Reference (IDOR) in a REST API endpoint that retrieves booking data. The endpoint fails to verify that the requesting user owns or has permission to access the requested booking, instead relying only on basic read capability checks. An attacker with any authenticated account (including self-registered customer or subscriber roles) can enumerate booking IDs and retrieve complete PII from any booking record in the system. The issue affects versions through 10.31.0 and has been fixed in version 10.31.3. No public proof-of-concept is currently available.
Affected products
- Salon Booking System Salon Booking System through 10.31.0
Timeline
- 2026-08-06: disclosed
- 2026-07-30: advisory
- 2026-08-10: patched: Fixed in version 10.31.3