# CVE-2026-17020: Salon Booking System WordPress plugin insecure direct object reference in REST API

Source: https://junglewise.ai/threats/cve-2026-17020-salon-booking-system-wordpress-plugin-insecure-direct-object  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-10. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-17020 · Severity: medium · CVSS 4.3 · Published 2026-08-10

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.

Technologies: [Salon Booking System](https://junglewise.ai/threats/technologies/salon-booking-system). Vendors: [Salon Booking System](https://junglewise.ai/threats/vendors/salon-booking-system).

## Quick answers

**Is CVE-2026-17020 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-17020 being exploited in the wild.

**How severe is CVE-2026-17020?** Medium severity, with a CVSS score of 4.3, published 10 August 2026.

**Which products and versions are affected?** Salon Booking System through 10.31.0.

**Is there a fix for CVE-2026-17020?** A patch was published on 2026-08-10: Fixed in version 10.31.3 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-17020 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-17020?** Check whether you run Salon Booking System at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## 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

## References

- [https://wpscan.com/vulnerability/6e7852e9-0acd-4a79-9240-b864b14459a3/](https://wpscan.com/vulnerability/6e7852e9-0acd-4a79-9240-b864b14459a3/)

## Related threats

- [The Salon Booking System missing authorization in REST API endpoint](https://junglewise.ai/threats/cve-2026-110035-the-salon-booking-system-wordpress-plugin-before-10-31-11-does)
- [Salon Booking System WordPress plugin SSRF and stored XSS in image URL](https://junglewise.ai/threats/cve-2026-110033-the-salon-booking-system-wordpress-plugin-before-10-31-11-does)
- [The Salon Booking System WordPress plugin insufficient access control in customer editor](https://junglewise.ai/threats/cve-2026-110032-the-salon-booking-system-wordpress-plugin-before-10-31-11-does)
- [The Salon Booking System plugin privilege escalation](https://junglewise.ai/threats/cve-2026-110031-the-salon-booking-system-wordpress-plugin-before-10-31-11-does)
- [Salon Booking System WordPress plugin CSRF in REST API](https://junglewise.ai/threats/cve-2026-110015-the-salon-booking-system-wordpress-plugin-before-10-31-9-does)