CVE-2026-17023

Salon Booking System – Free Version <= 10.30.33 - Unauthenticated Google Calendar Connection Hijack via OAuth Callback

Published Aug 10, 2026 CVSS 3.1 · 4.8 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Weaknesses CWE-20
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Salonbookingsystem
Salonbookingsystem salon Booking System
Wordpress
Wordpress wordpress
Weaknesses CWE-20
CWE-284
Vendors & Products Salonbookingsystem
Salonbookingsystem salon Booking System
Wordpress
Wordpress wordpress
Type Values Removed Values Added
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.
Title Salon Booking System – Free Version <= 10.30.33 - Unauthenticated Google Calendar Connection Hijack via OAuth Callback
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
WPScan
Published
Updated
Aug 11, 2026, 8:55 PM
Reserved
Jul 24, 2026, 10:19 AM
Status
Deferred
Published
Aug 10, 2026, 7:16 AM
Modified
Aug 26, 2026, 4:31 PM