zealopensource Smart Appointment & Booking Plugin up to 1.0.8 on WordPress saab_cancel_booking authorization

Summaryinfo

A vulnerability was found in zealopensource Smart Appointment & Booking Plugin up to 1.0.8 on WordPress and classified as critical. This impacts the function saab_cancel_booking of the component Appointment Handler. Such manipulation leads to authorization. This vulnerability is traded as CVE-2026-5693. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in zealopensource Smart Appointment & Booking Plugin up to 1.0.8 on WordPress. Affected by this issue is the function saab_cancel_booking of the component Appointment Handler. The manipulation with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was shared by Itthidej Aramsri. The advisory is available at wordfence.com. This vulnerability is handled as CVE-2026-5693 since 04/06/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 05/12/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Appointment Software

Vendor

• zealopensource

Name

• Smart Appointment & Booking Plugin

Version

• 1.0.0
• 1.0.1
• 1.0.2
• 1.0.3
• 1.0.4
• 1.0.5
• 1.0.6
• 1.0.7
• 1.0.8

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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