Vitest: Code injection via unauthenticated manual mock registration

Overview

Vitest is a Vite-native testing framework for JavaScript and TypeScript projects. From 2.1.0-beta.7 until 4.1.12 and 5.0.3, an unauthenticated non-browser WebSocket client that can reach a development server using interceptorPlugin can register a manual mock whose attacker-controlled url createManualModuleSource inserts unescaped into generated module source. When the developer browser loads the affected module, attacker-controlled JavaScript executes on the development-server origin. This issue is fixed in versions 4.1.12 and 5.0.3.

Affected

• vitest >= 2.1.0-beta.7, < 4.1.12
• vitest >= 5.0.0, < 5.0.3
• mocker >= 2.1.0-beta.7, < 4.1.12
• mocker >= 5.0.0, < 5.0.3

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.