Auth bypass in Salon Booking System

CVE-2026-17021

The Salon Booking System WordPress plugin before 10.30.34 does not properly restrict access to some of its booking-modification AJAX actions and does not verify ownership of the targeted booking, allowing unauthenticated users to tamper with the stored total of arbitrary bookings.

Vulnerability class: Broken Access Control

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (8.0th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-17021: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

  • Salon Booking System — versions 0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-17021?
CVE-2026-17021 is a medium-severity vulnerability in Salon Booking System, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-08-10.
How severe is CVE-2026-17021?
Medium severity. CVSS v3 base score is 5.3 out of 10.