Salon Booking System Facebook login permits authentication bypass
Salon Booking System through 10.30.26 contains an unauthenticated failure in its Facebook login flow. The handler accepts POST accessToken, resolves a WordPress user through SLN_Helper_FacebookLogin::getUserIDByAccessToken(), and can issue that user an authentication cookie. Version 10.30.27 adds a user-existence check before wp_set_auth_cookie().
- Component
- Salon booking system
- Plugin slug
salon-booking-system- Affected
- n/a through 10.30.26
- Safe version
10.30.27- Published
- Aug 13, 2026
This CVE was published Aug 13, 2026 and is one of 36 known issues for this plugin.
Update, patch or deactivate.
Update to 10.30.27 or later immediately. Invalidate active sessions and review Facebook-login events, account changes and privileged actions for unauthorized access.
A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.
Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.
Technical description
Unauthenticated Broken Authentication in Salon booking system <= 10.30.26 versions.
CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H