CVE-2025-52882
Claude Code IDE extensions allow websocket connections from arbitrary origins
En resumen
Las extensiones Claude Code en editores populares (VSCode, Cursor, IDEs JetBrains) permiten que atacantes se conecten desde sitios web maliciosos sin autorización. Esto podría permitir que los hackers lean tus archivos, vean en qué estás trabajando o ejecuten código si usas Jupyter Notebooks.
Detalle técnico
La vulnerabilidad existe por falta de validación adecuada de origen en conexiones WebSocket en las extensiones Claude Code (VSCode 0.2.116–1.0.23, JetBrains 0.1.1–0.1.8). Un atacante puede establecer conexiones WebSocket no autorizadas alojando una página maliciosa que el usuario visita. En variantes VSCode, esto permite lectura arbitraria de archivos, inspección del estado del IDE y ejecución de código en contextos Jupyter; en JetBrains, los atacantes obtienen eventos de selección, listas de archivos abiertos y datos de errores de sintaxis.
Resumen generado y traducido por IA a partir de la descripción oficial.
Claude Code is an agentic coding tool. Claude Code extensions in VSCode and forks (e.g., Cursor, Windsurf, and VSCodium) and JetBrains IDEs (e.g., IntelliJ, Pycharm, and Android Studio) are vulnerable to unauthorized websocket connections from an attacker when visiting attacker-controlled webpages. Claude Code for VSCode IDE extensions versions 0.2.116 through 1.0.23 are vulnerable. For Jetbrains IDE plugins, Claude Code [beta] versions 0.1.1 through 0.1.8 are vulnerable. In VSCode (and forks), exploitation would allow an attacker to read arbitrary files, see the list of files open in the IDE, get selection and diagnostics events from the IDE, or execute code in limited situations where a user has an open Jupyter Notebook and accepts a malicious prompt. In JetBrains IDEs, an attacker could get selection events, a list of open files, and a list of syntax errors. Claude released a patch for this issue on June 13th, 2025. Although Claude Code auto-updates when a user launch it and auto-updates the extensions, users should take the following steps, though the exact steps depend on one's integrated development environment (IDE). For VSCode, Cursor, Windsurf, VSCodium, and other VSCode forks, check the extension Claude Code for VSCode. Open the list of Extensions (View->Extensions), look for Claude Code for VSCode among installed extensions, update or uninstall any version prior to 1.0.24, and restart the IDE. For JetBrains IDEs including IntelliJ, PyCharm, and Android Studio, check the plugin Claude Code [Beta]. Open the Plugins list, look for Claude Code [Beta] among installed extensions, update or uninstall any version prior to 0.1.9, and restart the IDE.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N