CVE-2025-52882
Claude Code IDE extensions allow websocket connections from arbitrary origins
Em resumo
As extensões Claude Code em editores populares (VSCode, Cursor, IDEs JetBrains) permitem que atacantes se conectem a elas a partir de sites maliciosos sem autorização. Isso pode permitir que hackers leiam seus arquivos, vejam no que você está trabalhando ou executem código se você usar Jupyter Notebooks.
Detalhe técnico
A vulnerabilidade ocorre pela falta de validação adequada de origem em conexões WebSocket nas extensões Claude Code (VSCode 0.2.116–1.0.23, JetBrains 0.1.1–0.1.8). Um atacante pode estabelecer conexões WebSocket não autorizadas hospedando uma página maliciosa que o usuário acessa. Em variantes VSCode, isso permite leitura arbitrária de arquivos, inspeção do estado da IDE e execução de código em contextos Jupyter; em JetBrains, atacantes obtêm eventos de seleção, listas de arquivos abertos e dados de erros de sintaxe.
Resumo gerado e traduzido por IA a partir da descrição 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