Medium severity · published Aug 10, 2026
CVE-2026-17023
Salon Booking System – Free Version <= 10.30.33 - Unauthenticated Google Calendar Connection Hijack via OAuth Callback
4.8
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SB
Salon Booking System ·
through 10.30.33 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-17023
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-17023
wpscan.com
https://wpscan.com/vulnerability/a116db0a-38ea-43e3-a9cd-991768ce3e07/
More from Salon Booking System
8.8
CVE-2026-110015
Salon Booking System < 10.31.9 - Administrator Account Creation via CSRF
7.5
CVE-2026-17022
Salon Booking System – Free Version < 10.30.34 - Unauthenticated Booking Information Disclosure via Booking Wizard
7.5
CVE-2022-0920
Salon booking system < 7.6.3 - Customer+ Bookings/Customers Data Disclosure
7.2
CVE-2026-110031
Salon Booking System 10.17 - 10.31.10 - Salon Staff+ Privilege Escalation to Administrator via Case-Insensitive User Meta Key
6.8
CVE-2026-110033
Salon Booking System < 10.31.11 - Salon Staff+ Stored XSS and SSRF via Salon REST 'image_url'