CVE-2026-5693 - Smart Appointment & Booking <= 1.0.8 - Missing Authorization to Unauthenticated Arbitrary Booking Cancellation

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MEDIUM

Smart Appointment & Booking <= 1.0.8 - Missing Authorization to Unauthenticated Arbitrary Booking Cancellation

Published May 12, 2026

5.3

MEDIUM

CVSS 3.1

EPSS 0.39%

Description

The Smart Appointment & Booking plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check and a nonce validation logic flaw in the saab_cancel_booking() function in all versions up to, and including, 1.0.8. The nonce check uses && (AND) instead of || (OR), which means providing any value for the security parameter causes the entire check to be skipped. This makes it possible for unauthenticated attackers to cancel arbitrary bookings by supplying a predictable booking ID.

Affected products

Vendor Zealopensource Product Smart Appointment & Booking Default
unaffected
- Version
  0
  Status
  affected
  Constraints
  <=1.0.8

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Zealopensource

Smart Appointment & Booking

unaffected

Version	Status	Constraints
0	affected	<=1.0.8

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-862

Missing Authorization

References (4)

Link	Providers	Tags
https://plugins.trac.wordpress.org/browser/smart-appointment-booking/tags/1.0.8/inc/front/class.saab.front.action.php#L2558
https://plugins.trac.wordpress.org/browser/smart-appointment-booking/trunk/inc/front/class.saab.front.action.php#L2558
https://wordpress.org/plugins/smart-appointment-booking/
https://www.wordfence.com/threat-intel/vulnerabilities/id/afc3531d-6134-4b45-b532-37430d96a8fb?source=cve