PatchSiren

Simply Schedule CVE debriefs

These pages are published after PatchSiren validates generated defensive summaries against stored public CVE and source evidence.

Review Simply Schedule CVE published 2026-07-27

CVE-2026-13400

The Simply Schedule Appointments plugin for WordPress is vulnerable to unauthenticated Stored Cross-Site Scripting in all versions up to and including 1.6.12.2. The root cause is a sanitization-ordering defect: the rendered notification content is decoded back into live HTML after it has already passed through the Simply Schedule Appointments WordPress plugin before 1.6.12.4's wp_kses_post() filter, so a [truncated]