CVE-2025-52882: @anthropic ai/claude code Claude Code Improper Authorization Vulnerability
HIGHCVE-2025-52882 is a HIGH claude code improper authorization vulnerability (CWE-285: Improper Authorization) affecting @anthropic ai/claude code libraries in the npm ecosystem. The issue involves claude code improper authorization via websocket connections from arbitrary origins. Remediation is available by upgrading affected packages to version 1.0.24.
CVE-2025-52882 at a Glance
How to Fix CVE-2025-52882
To remediate this vulnerability, upgrade all affected @anthropic ai/claude code dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
npm install @anthropic-ai/claude-code@1.0.24Run the following command in your project directory to verify that all resolved dependencies use the patched release:
npm ls @anthropic-ai/claude-codeHow to Check if You Are Affected
To determine whether your Node.js application is affected by CVE-2025-52882, inspect your project dependencies using npm:
npm ls @anthropic-ai/claude-codeAnalyze the terminal output to locate any version of @anthropic ai/claude code in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.0.24), your application is affected.
Note: The npm ls @anthropic-ai/claude-code command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-285: Improper Authorization, where the product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. In @anthropic ai/claude code, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2025-52882 Affected @anthropic ai/claude code Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
@anthropic-ai/claude-code
|
npm |
≥ 0.2.116
< 1.0.24
|
1.0.24
|
References
Frequently Asked Questions
What is CVE-2025-52882?
Which @anthropic ai/claude code versions are affected?
What version fixes CVE-2025-52882?
Is @anthropic-ai/claude-code affected?
What CWE is associated with CVE-2025-52882?
How can I check npm dependencies for CVE-2025-52882?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-9f65-56v6-gxw7",
"modified" : "2025-06-27T23:07:59Z",
"published" : "2025-06-23T21:22:22Z",
"aliases" : [ "CVE-2025-52882" ],
"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. \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->Extensions)\n2. Look for Claude Code for VSCode among installed extensions\n3. If you have a version < 1.0.24, click “Update” (or “Uninstall”)\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 < 0.1.9\n4. Restart the IDE",
"severity" : [ {
"type" : "CVSS_V4",
"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"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "npm",
"name" : "@anthropic-ai/claude-code"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0.2.116"
}, {
"fixed" : "1.0.24"
} ]
} ]
} ],
"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"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-1385", "CWE-285" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2025-06-23T21:22:22Z",
"nvd_published_at" : "2025-06-24T20:15:26Z"
}
}