CVE-2026-76586: CWE-284 Improper Access Control in Appointment Booking Calendar Plugin and Scheduling Plugin
Description
The Appointment Booking Calendar Plugin and Scheduling Plugin for WordPress before version 1.6.3 contains an improper access control vulnerability. This flaw allows unauthenticated users to confirm paid appointments at a fraction of the intended price because the plugin does not verify the amount paid against the server-side price during online payment confirmation.
CVSS v3.1
Score 7.5high
Affected software
Appointment Booking Calendar Plugin and Scheduling Plugin
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-76586 is an improper access control vulnerability (CWE-284) affecting the Appointment Booking Calendar Plugin and Scheduling Plugin for WordPress versions before 1.6.3. The vulnerability arises because the plugin fails to verify that the payment amount matches the server-side price when confirming an online payment. This allows unauthenticated attackers to have paid appointments approved without paying the full price, potentially bypassing payment controls.
Potential Impact
An attacker can exploit this vulnerability to obtain paid appointments at a reduced cost or for free by manipulating the payment confirmation process. This results in financial loss to the service provider and unauthorized access to paid services. There is no indication of confidentiality or availability impact, but the integrity of payment processing is compromised.
Mitigation Recommendations
No official patch or remediation level has been published yet. Users should monitor the vendor's advisory for updates and apply the official fix once available. Until then, consider disabling the affected plugin or restricting its use to trusted users only to mitigate risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- WPScan
- Date Reserved
- 2026-08-19T14:17:03.913Z
- State
- PUBLISHED
Threat ID: 6a927ab6acd9273b496bdebe
Added to database: 08/29/2026, 06:22:46 UTC
Last enriched: 09/08/2026, 02:52:10 UTC
Last updated: 10/13/2026, 18:48:23 UTC
Views: 76
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