Brave Browser is getting a new feature called 'custom scriptlets' that lets advanced users inject their own JavaScript into websites, allowing deep customization and control over their browsing ...

Server-Side Template Injection (SSTI) occurs when an attacker can inject malicious code into a server-side template, causing the server to execute arbitrary commands. In the context of JavaScript, ...

A new proof-of-concept attack shows that malicious Model Context Protocol servers can inject JavaScript into Cursor’s browser — and potentially leverage the IDE’s privileges to perform system tasks.