CVE-2026-13400
Description
Simply Schedule Appointments 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 double-encoded payload survives intake and is reintroduced as an executable element at render time.
Metadata
Severity & Metrics
No CVSS data available.
Affected products (1)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| Unknown | Simply Schedule Appointments | — | 0 < 1.6.12.4 |
Weakness (CWE)
| CWE | Source | Description |
|---|---|---|
| — | cna | CWE-79 Cross-Site Scripting (XSS) |