GHSA-9f65-56v6-gxw7

Source

https://github.com/advisories/GHSA-9f65-56v6-gxw7

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/06/GHSA-9f65-56v6-gxw7/GHSA-9f65-56v6-gxw7.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-9f65-56v6-gxw7

Aliases

CVE-2025-52882

Published

2025-06-23T21:22:22Z

Modified

2025-06-27T23:29:44.115529Z

Severity

8.8 (High) CVSS_V4 - 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 CVSS Calculator

Summary

Claude Code Improper Authorization via websocket connections from arbitrary origins

Details

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.

Remediation

We released a patch for this issue on June 13th, 2025. Although Claude Code auto-updates when you launch it and auto-updates the extensions, you should take the following steps (the exact steps depend on your IDE).

VSCode, Cursor, Windsurf, VSCodium, and other VSCode forks Extension Name: Claude Code for VSCode

Instructions:

Open the list of Extensions (View->Extensions)
Look for Claude Code for VSCode among installed extensions
If you have a version < 1.0.24, click “Update” (or “Uninstall”)
Restart the IDE

All JetBrains IDEs including IntelliJ, PyCharm, and Android Studio Plugin name: Claude Code [Beta]

Instructions:

Open the Plugins list
Look for Claude Code [Beta] among installed extensions
Update (or Uninstall) the plugin if the version is < 0.1.9
Restart the IDE

Database specific

{
    "github_reviewed_at": "2025-06-23T21:22:22Z",
    "severity": "HIGH",
    "cwe_ids": [
        "CWE-1385",
        "CWE-285"
    ],
    "github_reviewed": true,
    "nvd_published_at": "2025-06-24T20:15:26Z"
}

References

Affected packages

npm / @anthropic-ai/claude-code

Package

Name: @anthropic-ai/claude-code; View open source insights on deps.dev
Purl: pkg:npm/%40anthropic-ai/claude-code

Affected ranges

Type: SEMVER
Events: Introduced

0.2.116

Fixed

1.0.24

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/06/GHSA-9f65-56v6-gxw7/GHSA-9f65-56v6-gxw7.json"