CVE-2026-77689: CWE-284 Improper Access Control in Booking for Appointments and Events Calendar
The Booking for Appointments and Events Calendar WordPress plugin before 9.8.1 does not verify that a payment was actually taken before recording a booking as paid, trusting the payment gateway named in a public, unauthenticated booking request even when the site has never configured that gateway. This lets an unauthenticated attacker obtain confirmed, fully paid appointments and events without any payment being collected.
AI Analysis
Technical Summary
CVE-2026-77689 is an improper access control vulnerability (CWE-284) in the Booking for Appointments and Events Calendar WordPress plugin versions 9.0 up to but not including 9.8.1. The plugin fails to verify payment completion before recording a booking as paid, relying instead on a payment gateway identifier sent in a public, unauthenticated booking request. This allows attackers to bypass payment requirements and secure paid bookings without actual payment processing.
Potential Impact
An unauthenticated attacker can exploit this vulnerability to obtain confirmed and fully paid bookings for appointments and events without paying. This can lead to financial loss for the site owner and potential disruption of appointment or event scheduling.
Mitigation Recommendations
Upgrade the Booking for Appointments and Events Calendar plugin to version 9.8.1 or later, where this vulnerability is fixed. No other mitigation is indicated by the available data.
CVE-2026-77689: CWE-284 Improper Access Control in Booking for Appointments and Events Calendar
Description
The Booking for Appointments and Events Calendar WordPress plugin before 9.8.1 does not verify that a payment was actually taken before recording a booking as paid, trusting the payment gateway named in a public, unauthenticated booking request even when the site has never configured that gateway. This lets an unauthenticated attacker obtain confirmed, fully paid appointments and events without any payment being collected.
CVSS v3.1
Score 5.3medium
Affected software
Booking for Appointments and Events Calendar
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-77689 is an improper access control vulnerability (CWE-284) in the Booking for Appointments and Events Calendar WordPress plugin versions 9.0 up to but not including 9.8.1. The plugin fails to verify payment completion before recording a booking as paid, relying instead on a payment gateway identifier sent in a public, unauthenticated booking request. This allows attackers to bypass payment requirements and secure paid bookings without actual payment processing.
Potential Impact
An unauthenticated attacker can exploit this vulnerability to obtain confirmed and fully paid bookings for appointments and events without paying. This can lead to financial loss for the site owner and potential disruption of appointment or event scheduling.
Mitigation Recommendations
Upgrade the Booking for Appointments and Events Calendar plugin to version 9.8.1 or later, where this vulnerability is fixed. No other mitigation is indicated by the available data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-08-21T07:25:37.099Z
- State
- PUBLISHED
Threat ID: 6aa4ee6055bf5e2cf5f21fd6
Added to database: 09/12/2026, 06:17:04 UTC
Last enriched: 09/12/2026, 06:48:33 UTC
Last updated: 09/13/2026, 04:01:23 UTC
Views: 13
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