CVE-2026-1932: Appointment Booking Calendar Plugin <= 1.0.2 - Missing Authorization to Unauthenticated Arbitrary Appointment Status Modification

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-14 · updated 2026-06-17
Weakness: CWE-862

Description

The Appointment Booking Calendar Plugin – Bookr plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the update-appointment REST API endpoint in all versions up to, and including, 1.0.2. This makes it possible for unauthenticated attackers to modify the status of any appointment.

Affected products

bssoftware Appointment Booking Calendar Plugin – Bookr: through 1.0.2

References

https://plugins.trac.wordpress.org/browser/bookr/tags/1.0.2/includes/rest-api/controller/appointment-controller.php#L47
https://plugins.trac.wordpress.org/browser/bookr/trunk/includes/rest-api/controller/appointment-controller.php#L47
https://www.wordfence.com/threat-intel/vulnerabilities/id/2ab4baab-9e91-4ed5-9749-4a14e8180e71?source=cve

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