Medium 5.3Published May 12, 2026

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

Updated under an hour ago (Oct 25, 2026, 11:30 PM ET)

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It affects zealopensource Smart Appointment & Booking. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for zealopensource Smart Appointment & Booking

Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness (CWE): CWE-862
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Wordfence
NVD analysis: Deferred
Record last updated: May 12, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

zealopensource Smart Appointment & Booking zealopensource:smart_appointment_and_booking (from the name)	through 1.0.8	CNA record

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.