CVE-2026-16540
Received Received - Intake

Unauthenticated Data Exposure in Simply Schedule Appointments WordPress Plugin

Publication date: 2026-08-02

Last updated on: 2026-08-02

Assigner: WPScan

Description
The Simply Schedule Appointments WordPress plugin before 1.6.12.6 does not correctly restrict a bulk appointment operation to the requester's own records, allowing unauthenticated users to retrieve the personal data of all appointments across the site and, on premium editions, to permanently delete them.

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Meta Information

Published
2026-08-02
Last Modified
2026-08-02
Generated
2026-08-02
AI Q&A
2026-08-02
EPSS Evaluated
N/A
NVD
CVE-2026-16540
EUVD
EUVD-2026-51951

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
simply_schedule_appointments simply_schedule_appointments to 1.6.12.6 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

The Simply Schedule Appointments WordPress plugin before version 1.6.12.6 has a flaw where bulk appointment operations are not properly restricted. This allows unauthenticated users to access personal data from all appointments on the site and, in premium versions, permanently delete them.

Detection Guidance

To detect this vulnerability, check if your WordPress site uses the Simply Schedule Appointments plugin version before 1.6.12.6. Inspect the plugin version in the WordPress admin panel or via database queries. Test for unauthorized access by attempting to retrieve or delete appointments without proper authentication.

Impact Analysis

Unauthenticated users could view sensitive personal appointment data across the entire site. Premium edition users could also permanently delete all appointment records, causing data loss and operational disruption.

Compliance Impact

This vulnerability likely violates GDPR and HIPAA by exposing personal data to unauthorized parties and potentially leading to permanent data deletion without consent.

Mitigation Strategies

Update the Simply Schedule Appointments WordPress plugin to version 1.6.12.6 or later to address the vulnerability.

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