github - GHSA-9f65-56v6-gxw7

GHSA-9F65-56V6-GXW7

Vulnerability from github – Published: 2025-06-23 21:22 – Updated: 2025-06-27 23:07

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

Severity ?

8.8 (High)


                  
                    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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@anthropic-ai/claude-code"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.2.116"
            },
            {
              "fixed": "1.0.24"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-52882"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1385",
      "CWE-285"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-06-23T21:22:22Z",
    "nvd_published_at": "2025-06-24T20:15:26Z",
    "severity": "HIGH"
  },
  "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.  \n\nIn 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.\n\n**Remediation**\n\nWe 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).\n\n**VSCode, Cursor, Windsurf, VSCodium, and other VSCode forks**\nExtension Name: Claude Code for VSCode\n\nInstructions:\n\n1. Open the list of Extensions (View-\u003eExtensions)\n2. Look for Claude Code for VSCode among installed extensions\n3. If you have a version \u003c 1.0.24, click \u201cUpdate\u201d (or \u201cUninstall\u201d)\n4. Restart the IDE \n\n**All JetBrains IDEs including IntelliJ, PyCharm, and Android Studio**\nPlugin name: Claude Code [Beta]\n\nInstructions:\n\n1. Open the Plugins list\n2. Look for Claude Code [Beta] among installed extensions\n3. Update (or Uninstall) the plugin if the version is \u003c 0.1.9\n4. Restart the IDE",
  "id": "GHSA-9f65-56v6-gxw7",
  "modified": "2025-06-27T23:07:59Z",
  "published": "2025-06-23T21:22:22Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/anthropics/claude-code/security/advisories/GHSA-9f65-56v6-gxw7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-52882"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/anthropics/claude-code"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Claude Code Improper Authorization via websocket connections from arbitrary origins"
}

CVE-2025-52882 (GCVE-0-2025-52882)

Vulnerability from cvelistv5 – Published: 2025-06-24 20:01 – Updated: 2025-06-24 20:43

Title

Claude Code IDE extensions allow websocket connections from arbitrary origins

Summary

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.

Severity ?

8.8 (High)


                        
                          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

CWE

CWE-1385 - Missing Origin Validation in WebSockets

Assigner

GitHub_M

References

URL

Tags

https://github.com/anthropics/claude-code/securit…

x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	anthropics	claude-code	Affected: >= 0.2.116 < 1.0.24

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-52882",
                "options": [
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                  },
                  {
                    "Technical Impact": "partial"
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                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-06-24T20:43:30.375886Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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        "title": "CISA ADP Vulnrichment"
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    "cna": {
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          "vendor": "anthropics",
          "versions": [
            {
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            }
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      ],
      "descriptions": [
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          "lang": "en",
          "value": "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\u0027s 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-\u003eExtensions), 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."
        }
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      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
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            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "HIGH",
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            "vectorString": "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
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            "vulnIntegrityImpact": "HIGH"
          }
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      "problemTypes": [
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          "descriptions": [
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              "cweId": "CWE-1385",
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      "providerMetadata": {
        "dateUpdated": "2025-06-24T20:01:49.595Z",
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    "dateReserved": "2025-06-20T17:42:25.708Z",
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  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-9F65-56V6-GXW7

CVE-2025-52882 (GCVE-0-2025-52882)

Tags

Sightings

Nomenclature