CVE-2026-15254: Unknown Simply Schedule Appointments

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

The Simply Schedule Appointments WordPress plugin before 1.6.12.11 does not perform a capability check on an administrative appointment-listing shortcode, and its per-user result scoping fails open for non-staff users, allowing users with the Contributor role and above to disclose all customers' appointment records, including names, email addresses, phone numbers and notes, across the whole site.

Affected products

• Unknown Simply Schedule Appointments: before 1.6.12.11 (fixed in 1.6.12.11)

Published 2026-08-03. Last modified 2026-08-26.