CVE-2026-87891
Received Received - Intake

Unauthenticated Holiday Schedule Modification in Rox Appointment Booking

Publication date: 2026-09-12

Last updated on: 2026-09-12

Assigner: WPScan

Description
The Rox Appointment Booking WordPress plugin before 1.2.0 does not perform any capability or authorization check when saving its holiday schedule, allowing unauthenticated attackers to overwrite the dates the booking system treats as unavailable, which can block legitimate bookings or open dates the site owner intended to keep closed.

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Meta Information

Published
2026-09-12
Last Modified
2026-09-12
Generated
2026-09-12
AI Q&A
2026-09-12
EPSS Evaluated
N/A
NVD
CVE-2026-87891
EUVD
EUVD-2026-76802

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
rox_appointment_booking rox_appointment_booking to 1.2.0 (exc)
rox appointment_booking to 1.2.0 (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

This vulnerability in the Rox Appointment Booking WordPress plugin before version 1.2.0 allows unauthenticated attackers to modify the holiday schedule via the REST API. The plugin fails to perform capability or authorization checks when saving holiday schedule data, enabling attackers to overwrite dates marked as unavailable.

Detection Guidance

Check if the Rox Appointment Booking plugin version is below 1.2.0. Use WordPress admin panel or run a command like 'wp plugin list' if using WP-CLI to verify the installed version.

Impact Analysis

Attackers could block legitimate bookings by marking dates as unavailable or open dates that the site owner intended to keep closed. This disrupts normal booking operations and may cause financial or reputational harm.

Compliance Impact

This vulnerability could indirectly impact compliance with GDPR or HIPAA by disrupting the availability of booking services. Blocked legitimate bookings may lead to service denials, while unauthorized date modifications could compromise data integrity or scheduling integrity for sensitive appointments.

Mitigation Strategies

Update the Rox Appointment Booking plugin to version 1.2.0 or later immediately to patch the vulnerability. Disable the plugin temporarily if an update is not immediately available.

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